Facial Redness and Broken Capillaries: Why a Broken Capillary Is Not Broken, Why the Red Face Is Usually Rosacea or Sun and Not Damage, What a Vascular Laser Actually Does to a Vessel, Where IPL and the KTP Laser Fit, and Why the Redness Comes Back

Facial redness, and the broken capillaries that come with it, is the complaint that fills the widest range of waiting rooms. The dermatologist sees it as rosacea. The plastic surgeon sees it as sun damage on a face that is about to be lifted. The med spa sees it as a photofacial package. The patient sees it in the mirror every morning as a cheek that is pinker than it used to be, a nose with fine red threads across the sides, a flush that arrives with the first glass of wine and stays through dessert, and a base layer of foundation that has quietly become mandatory. The words the patient uses are almost always the same: broken capillaries. And the phrase is wrong in a way that matters, because it implies something snapped and could be repaired, when the actual problem is a vessel that opened and will never close on its own.

The short version, which the rest of this piece defends: the red face is produced by three different things that look alike from across a room. The first is discrete dilated vessels, telangiectasia, which are permanent and which a vascular laser destroys well. The second is diffuse background erythema, a fixed pink or red tone across the central face produced by a dense mesh of vessels too small to see individually, which lasers and intense pulsed light reduce but rarely erase. The third is flushing, a transient neurovascular event driven by heat, alcohol, stress, and a dozen other triggers, which no laser touches at all. Most patients have some mixture of the three, most of that mixture is rosacea or accumulated sun exposure rather than anything that happened to the skin, and the reason the redness comes back after a successful treatment is not that the laser failed. It is that the skin kept making vessels.

This piece sits beside the piece on lasers for sun spots and pigmentation, which covers the brown half of photodamage and the devices that target melanin rather than blood, the piece on ablative versus non-ablative resurfacing, which covers the lasers that remodel skin texture rather than close vessels, and the piece on cosmetic procedures on deeper skin tones, which covers why every device in this article behaves differently on skin with more melanin in it. What none of them does is start from the red face itself and work backward to the vessel.

Facial redness, broken capillaries, and rosacea are three different problems that arrive in one consultation

The short answer: a broken capillary is a telangiectasia, a small blood vessel in the upper dermis that has permanently dilated and become visible through thin facial skin, and it is one of three components of the red face, the other two being a diffuse background erythema produced by vessels too fine to see and a transient flush produced by nerves rather than by vessel damage; the great majority of patients with all three have rosacea, a chronic condition estimated by the National Rosacea Society to affect about sixteen million Americans, and a plan that does not name which component it is treating is not a plan.

Start with the vessel. The skin of the central face is thin, richly supplied with blood, and exposed to more ultraviolet light over a lifetime than any other surface of the body. Under that skin sits a network of capillaries and slightly larger venules whose walls are a single layer of cells thick. When those walls lose the support of the collagen around them, whether through decades of sun, through the chronic inflammation of rosacea, through years of topical steroid use, or through simple inheritance, they dilate. A vessel a few hundredths of a millimeter across becomes wide enough to see as a fine red thread. Nothing has burst. Nothing is bleeding. The vessel is intact and doing its job; it is simply too wide and too close to the surface, and because there is no muscle in its wall to squeeze it back down, it stays that way. This is why no serum, no vitamin K cream, no facial, and no amount of avoiding hot showers makes an established telangiectasia disappear. The vessel does not know it is a problem.

Telangiectasias come in recognizable patterns, and the pattern tells the surgeon what caused them. Fine linear red vessels along the sides of the nose and across the cheeks in a fair-skinned adult are the signature of rosacea and sun combined. A single red dot with fine legs radiating from it, which blanches when the center is pressed and refills from the middle outward, is a spider angioma, an arteriole feeding a starburst of capillaries, common in pregnancy and in anyone with a liver that is not entirely well. A small, smooth, bright red dome the size of a pinhead or a pencil eraser is a cherry angioma, a benign growth of vessels that multiplies with age and has nothing to do with rosacea. A soft dark blue bump on the lip is a venous lake. A reticulated red and brown mottling on the sides of the neck and the upper chest, sparing the shaded skin under the chin, is poikiloderma of Civatte, decades of sun on a surface no one thought to protect. Each of these responds to a slightly different wavelength, and a practice that treats all of them with whatever device it owns is guessing.

Background erythema is the second component and the one patients notice least until it is pointed out. It is the fixed pink or red cast across the cheeks, nose, chin, and central forehead that does not fade over the course of the day, that photographs as a flush even when the patient feels calm, and that is produced not by individual visible vessels but by an increased density of dilated vessels below the threshold of vision. It is the redness that a green-tinted primer is sold to neutralize. It is also the component that responds least completely to lasers, because there is no discrete target to hit, only a diffuse mesh that has to be heated gently and repeatedly.

Flushing is the third, and it is the one that a laser office would rather not discuss. A flush is a wave of redness and warmth, sometimes with a sting, that arrives within seconds of a trigger and fades over minutes to an hour. It is driven by nerves and by chemical signals released in the skin, not by structural changes in vessels, and it is the earliest and most persistent feature of rosacea. In a survey of over a thousand rosacea patients published by the National Rosacea Society, the leading reported triggers were sun exposure in about eighty-one percent, emotional stress in about seventy-nine percent, hot weather in about seventy-five percent, wind in about fifty-seven percent, heavy exercise in about fifty-six percent, alcohol in about fifty-two percent, hot baths in about fifty-one percent, and spicy foods in about forty-five percent. The list matters because a patient whose main complaint is the flush, rather than the vessels or the fixed tone, is not a laser patient at all, however many sessions she is sold.

Rosacea ties the three together. It is a chronic inflammatory condition of the central face that the American Academy of Dermatology and the National Rosacea Society reclassified in 2017 by phenotype rather than by the old four subtypes, so that a given patient is described by which features she has: persistent central erythema, flushing, telangiectasia, papules and pustules, thickened skin most often on the nose, and eye involvement. A global meta-analysis published in the British Journal of Dermatology in 2018 put the prevalence at just over five percent of adults. Most rosacea patients who present for laser treatment have the erythema and telangiectasia features with or without flushing, and most of them have never been told they have a diagnosis, because the redness was framed as a cosmetic concern rather than a medical condition, which it is.

There is a short list of things that are not rosacea and that must be excluded before anyone fires a laser, because they are the reason a physician rather than a technician should see the face first. A butterfly rash across the cheeks and nose that spares the folds beside the nostrils is the pattern of lupus. Flushing that comes with diarrhea, wheezing, or a racing heart deserves a workup for carcinoid or mastocytosis before it deserves a photofacial. Redness that started after months of a topical steroid cream, often prescribed for something else, is steroid-induced and clears only when the steroid stops, an effect related to the skin thinning that steroids produce in any tissue they touch. Greasy pink scale in the eyebrows and beside the nose is seborrheic dermatitis. New flushing in a woman in her late forties is more often menopause than rosacea. A red face in a patient taking niacin, a calcium channel blocker, or certain antidepressants may be the drug.

• Telangiectasia (the broken capillary): a permanently dilated, intact vessel visible through thin skin; the laser's proper target.
• Background erythema: a fixed pink cast from a dense mesh of subvisible vessels; reduced by lasers and IPL, rarely erased.
• Flushing: a transient neurovascular event driven by triggers; untouched by any device.
• The named lesions: spider angioma, cherry angioma, venous lake, and poikiloderma of Civatte each have a different depth, size, and color and want a different wavelength.
• The exclusions: lupus, carcinoid and mastocytosis, steroid-induced redness, seborrheic dermatitis, menopause, and drug flushing all masquerade as rosacea and none of them is a laser problem.

What a vascular laser actually does to a blood vessel

The short answer: a vascular laser fires light at a wavelength that oxygenated hemoglobin absorbs far more strongly than the surrounding skin does, in a pulse long enough to heat the blood and the vessel wall to the point of coagulation but short enough that the heat does not spread into the tissue around it, and the body then clears the destroyed vessel over the following weeks; this is selective photothermolysis, the principle laid out by Anderson and Parrish in Science in 1983, and every device in this article is a variation on it.

Blood absorbs light at specific wavelengths. Oxyhemoglobin has a large absorption peak in the violet at about 418 nanometers and two smaller peaks in the green and yellow at about 542 and 577 nanometers. Melanin, the pigment in the epidermis above the vessel, absorbs across the whole visible spectrum but progressively less as the wavelength lengthens. The engineering problem, then, is to pick a wavelength that hemoglobin absorbs strongly and melanin absorbs comparatively weakly, so that the energy goes into the vessel and not into the skin over it, and to deliver it in a pulse whose length matches the time it takes the vessel to cool.

That last variable is the one patients never hear about, and it decides whether they bruise. Every structure has a thermal relaxation time, the interval over which it sheds about half the heat deposited in it. For a facial telangiectasia a few tens of microns across, that time is on the order of one to ten milliseconds. Fire a pulse much shorter than that and the vessel heats so fast that the blood inside it boils and the wall ruptures, producing the deep purple bruise called purpura that lasts a week to two weeks. Fire a pulse in the range of the relaxation time or a little longer and the vessel heats gradually, the blood coagulates, the wall is injured and closes, and there is little or no bruising. The first approach clears vessels faster and in fewer sessions. The second is the one most cosmetic patients want because they have jobs on Monday. Neither is wrong; they are different trades between downtime and number of visits, and a practice that never mentions the choice has made it for you.

The pulsed dye laser is the workhorse. It fires yellow light at 595 nanometers (the original devices, cleared in the late 1980s for port-wine birthmarks, fired at 585), close enough to the 577 peak to be absorbed avidly by blood and long enough in wavelength to reach vessels a millimeter or so below the surface. Its pulse can be set anywhere from a fraction of a millisecond to tens of milliseconds, which is what allows the same machine to bruise on purpose for a stubborn vessel or to treat sub-purpurically for diffuse redness. Every modern pulsed dye laser sprays a burst of cryogen onto the skin milliseconds before each pulse, cooling the epidermis so that the melanin above the vessel is protected while the blood below is heated. The sensation is a snap of a rubber band followed by cold, and a full face takes about fifteen minutes.

The KTP laser fires green light at 532 nanometers, produced by passing a 1064 nanometer beam through a potassium titanyl phosphate crystal that doubles its frequency. Green light is absorbed by blood even more strongly than yellow, but it also penetrates less deeply and is absorbed more by melanin, so the KTP is at its strongest on fine, superficial, discrete red vessels in fair skin, such as the threads along the nose, and at its weakest on deep or diffuse redness and on darker skin. Many practices treat individual vessels with a small KTP spot, tracing each thread until it blanches, and then treat the surrounding background with a larger pulsed dye or IPL pass.

The long-pulsed Nd:YAG laser fires infrared light at 1064 nanometers, a wavelength blood absorbs only weakly and melanin barely at all. That sounds like a disadvantage, and for fine red vessels it is, but the weak absorption is exactly what lets the beam penetrate several millimeters to reach the larger, deeper, blue vessels around the eyes, beside the nose, and at the temples that the shorter wavelengths cannot touch, and it is also what makes the Nd:YAG the only vascular device that can be used with any real safety on the darkest skin. It is painful, it heats a larger volume of tissue, and in the wrong hands it is the vascular laser most capable of producing a scar, because the same penetration that reaches the vessel also reaches everything around it.

How well does any of this work? The evidence base is smaller than the market would suggest. The Cochrane review of interventions for rosacea, most recently updated in 2019, found the trials of pulsed dye laser and intense pulsed light for erythema and telangiectasia to be few, small, and of low to moderate quality, though consistent in direction. A frequently cited split-face randomized trial published in Dermatologic Surgery in 2009 treated one side of each patient's face with pulsed dye laser and the other with intense pulsed light and found the two roughly equivalent for the erythema and vessels of rosacea, with both producing a meaningful but incomplete reduction after a course of treatments. In practice, discrete telangiectasias clear substantially in one to three sessions, diffuse erythema improves by something like a third to a half over three to five sessions, and neither result is permanent in a patient whose rosacea is active.

"

A broken capillary is not broken. It is a vessel that opened and forgot how to close, and no cream, serum, or facial will remind it. The laser does not heal it. It destroys it, and the body clears the wreckage over a few weeks. What no laser can do is stop the skin from opening the next one.

"

Where IPL and the KTP laser fit, and why the device on the menu often picked the patient

The short answer: intense pulsed light is not a laser but a filtered flashlamp that emits a broad band of wavelengths at once, which makes it the most versatile device for a fair-skinned face with both brown spots and diffuse redness and the least precise device for a discrete vessel or a darker complexion; the pulsed dye laser is the more targeted tool for redness on any skin up to about Fitzpatrick type four; the KTP is the tracing tool for fine individual threads; the Nd:YAG is the tool for deep blue vessels and for dark skin; and the reason so many patients receive IPL for everything is that IPL is the device most offices own.

Intense pulsed light deserves its own paragraph because it is the device most patients have already had, usually under the trade name photofacial. An IPL handpiece contains a xenon flashlamp that emits light across roughly 500 to 1200 nanometers in a single flash, with a glass filter that blocks everything below a chosen cutoff. Set the cutoff at about 560 nanometers and the remaining band is absorbed by both hemoglobin and melanin, so one pass treats fine vessels, background redness, and brown sun spots together, which is precisely why it is popular for the mixed photodamage of a fair-skinned face in its forties. The trade is precision. Because the band is broad, a substantial fraction of the energy is absorbed by melanin in the epidermis rather than by blood, which means less energy reaches the vessel, more sessions are needed for the same result, and the risk to skin with more melanin rises quickly. The piece on melasma treatment covers the related problem of IPL heating a melasma-prone face into a darker one, a well-documented complication that a redness-focused consultation frequently forgets to ask about.

IPL also leaves a characteristic mark when misused. The handpiece is a rectangle, and a technician who does not overlap the pulses correctly, or who sets the fluence too high on a patch of tanned or darker skin, produces a grid of rectangular light or dark footprints across the cheek that can take months to fade and occasionally does not. Poikiloderma of the neck is the territory where this happens most, because the skin there is thin, the pigment is patchy, and the vessels are shallow. It is a legitimate IPL indication and one of the easiest to get wrong.

The choice of device, in an honest consultation, follows from three questions. What is the color and size of the target vessel? Fine red superficial threads want green or yellow light; larger blue deeper vessels want infrared. How much melanin is in the skin above it? The pulsed dye laser with good cooling is used with reasonable safety through Fitzpatrick type four with conservative settings; IPL is generally avoided above type three or four; the Nd:YAG is the device for types five and six, with a test spot first, and even then the conversation the deeper skin tones piece describes about pigment change has to happen. And is the redness diffuse or discrete? Diffuse erythema is a large-spot, low-fluence, multi-session problem; a discrete vessel is a small-spot, tracing problem that one session may finish.

The uncomfortable truth about who ends up with which device is that it is frequently determined by the inventory of the office rather than the anatomy of the patient. A pulsed dye laser is a large, expensive machine that requires maintenance and replacement dye kits. A KTP is smaller but still a laser with the regulatory and training burden that carries. An IPL unit is comparatively cheap, is marketed as safe enough for delegated use, and is therefore the device in nearly every med spa in Los Angeles. The piece on who is holding the device in a med spa covers how supervision and delegation actually work for energy devices, but the relevant point here is simpler: a patient with a single stubborn vessel on the side of the nose who is sold a package of five IPL sessions has been matched to the machine, not to her problem.

Eye safety is worth a paragraph because it is where the device choice goes from expensive to dangerous. Every device in this article is absorbed by the pigment of the iris, and light that reaches the eye through a closed lid, or that bounces from a handpiece placed inside the bony orbit, can damage it. There are published case reports of iris atrophy, pupil abnormalities, and persistent light sensitivity after IPL treatment of the lower lid and the skin beside the eye without proper metal eye shields placed on the eye itself. The external goggles handed to patients in most offices protect against a stray beam. They do not protect against a pulse fired at the lid. Any treatment of vessels within the orbital rim requires shields placed under the lid by someone trained to place them, and a practice that treats the periorbital area without them should not be treating it at all. The piece on under-eye dark circles covers the vascular contribution to the dark lower lid, which is precisely the area where this shortcut is most tempting.

• Pulsed dye laser, 595 nm: the most targeted tool for facial redness and telangiectasia; purpuric or non-purpuric by pulse setting; usable through Fitzpatrick type four with cooling.
• KTP laser, 532 nm: the tracing tool for fine superficial threads on fair skin; weak on deep or diffuse redness; more melanin absorption than yellow light.
• Long-pulsed Nd:YAG, 1064 nm: deep blue vessels, venous lakes, and the only reasonable choice for the darkest skin; the highest scar potential in careless hands.
• Intense pulsed light, 500 to 1200 nm filtered: the versatile choice for fair skin with mixed brown and red photodamage; imprecise, melanin-hungry, footprint-prone, and the device most offices own.
• Eye shields: metal shields on the eye, not goggles, for anything inside the orbital rim.

What the laser cannot do: flushing, active rosacea, and the medical treatment that has to run alongside

The short answer: a vascular laser destroys the vessels that exist on the day of treatment and does nothing to the flushing that produces new ones, so a patient with active rosacea who is lasered without a medical plan will watch her redness return over twelve to twenty-four months and conclude, wrongly, that the laser failed; the honest program pairs the device with trigger control, a mineral sunscreen worn every day, and, depending on the phenotype, a prescription vasoconstrictor for the background flush or an anti-inflammatory for papules, and it budgets for maintenance sessions from the start.

The mechanism of relapse is worth stating plainly. The laser coagulates the dilated vessels present at the moment of the pulse. It does not alter the skin's tendency to dilate. In a patient whose redness came from a decade of sun exposure that ended when she started wearing a hat, the treated vessels stay gone and the result can hold for years. In a patient with rosacea, every flush is an episode of vasodilation in a face whose vessels are already prone to stay open, and the same biology that made the first thousand telangiectasias continues making the next thousand. Retreatment at intervals of a year or two is the norm, not the exception, and a practice that presents a course of laser as a cure for rosacea redness is presenting it dishonestly.

Flushing itself has a small and imperfect pharmacology. Two topical vasoconstrictors carry FDA approval for the persistent facial erythema of rosacea: brimonidine gel, approved in 2013, and oxymetazoline cream, approved in 2017. Both squeeze the dilated vessels shut for a portion of the day. In the pivotal trials of oxymetazoline, roughly one patient in eight achieved a two-grade improvement on both the physician and the patient scales at the twelve-hour mark, against roughly one in fifteen on the vehicle cream, which is a real but modest effect. Brimonidine, in particular, acquired a reputation in post-marketing reports for a rebound erythema in a meaningful minority of users, a redness worse than baseline as the drug wears off, which is why many dermatologists now start with oxymetazoline or use either drug only for specific occasions rather than daily. Neither drug treats telangiectasia. They are for the background and the flush, and they are exactly the piece of the plan that a laser office is not equipped to provide.

The papules and pustules of rosacea, when present, have their own ladder: azelaic acid, metronidazole, and ivermectin as creams, the last approved in 2014 and directed at the Demodex mites that populate rosacea skin in unusual numbers; a low, anti-inflammatory dose of doxycycline, forty milligrams in a modified-release capsule, approved in 2006 and dosed below the threshold at which it acts as an antibiotic; and, for the severe and the stubborn, low-dose isotretinoin, which raises the timing question the piece on isotretinoin and procedure waiting periods covers in detail. It is worth knowing that the 2017 consensus on that question specifically found insufficient evidence to justify the traditional six-to-twelve-month delay for vascular lasers, so a rosacea patient on isotretinoin need not necessarily postpone the pulsed dye laser, though the conversation has to happen. A face with active papules is also a face that a laser will inflame further and treat less well; the medical plan comes first, and the vessels are lasered once the inflammation is quiet.

Then there is the unglamorous foundation of every rosacea plan, which no device replaces. Daily sun protection with a mineral sunscreen, since chemical filters sting reactive skin and sun is the leading reported trigger. A skin routine stripped of fragrance, alcohol, witch hazel, menthol, and exfoliating acids, all of which provoke the flush. No topical steroids on the face, ever, unless a dermatologist has a specific reason. Identification of the two or three personal triggers that matter most from the long list, since asking a patient to avoid all of them is asking her to avoid life. A tinted mineral sunscreen or a green-toned primer for the days between treatments. None of this is expensive and all of it is skipped by the office whose only tool is a flashlamp.

Two related procedures deserve a sentence each. A red, raised, or immature surgical scar is a vascular target, and the pulsed dye laser is the device the piece on scar care describes for fading the redness of a facelift or tummy tuck incision in its first months. And the red, flat, persistent flush after an ablative resurfacing or a deep phenol peel is a post-inflammatory erythema that the same laser treats, at low fluence, when it lingers past the expected window. The vascular laser is a scar tool and a resurfacing-aftercare tool as much as it is a rosacea tool, and a surgical practice that owns one has usually bought it for those reasons first.

The plan by pattern, what recovery looks like, what it costs, and who should not be lasered

The short answer: a handful of discrete vessels beside the nose is a one-to-two-session KTP or pulsed dye problem with little or no downtime; diffuse background redness is a three-to-five-session pulsed dye or IPL course at sub-purpuric settings with maintenance every year or two; flushing-dominant rosacea is a medical problem with the laser as an adjunct; mixed brown-and-red photodamage in fair skin is the IPL indication; deep blue periorbital vessels and dark skin are Nd:YAG territory with a test spot; a session costs a few hundred dollars, a first year runs into the low thousands, and insurance pays for essentially none of it unless the target is a port-wine birthmark.

Match the plan to the pattern. The patient with a dozen fine threads along the sides of the nose and the tops of the cheeks, fair skin, and no real flushing is the easiest case in this article: a KTP or a small-spot pulsed dye laser traces each vessel, one or two sessions four to six weeks apart, and the result holds for years if the sun is managed. The patient with a fixed pink cast across the whole central face, a few visible vessels, and a flush with wine is the typical rosacea presentation: a large-spot pulsed dye laser at sub-purpuric settings or, in fair skin, an IPL, in three to five sessions, alongside the medical plan above, with a maintenance session budgeted every twelve to twenty-four months. The patient whose main complaint is that she turns crimson in meetings, with little fixed redness between episodes, is not a laser patient and should be told so before money changes hands. The patient with brown spots and red mottling together on a fair face in its fifties is the IPL case the device was built for. The patient with a blue vein under the eye or at the temple, or with skin of Fitzpatrick type five or six, needs a long-pulsed Nd:YAG, a test spot, and a physician who has treated that skin before. Cherry angiomas, whatever the rest of the face is doing, are single-session targets for a KTP, a pulsed dye laser, or a fine electrodesiccation needle, and no one should be paying for a course to remove them.

Recovery depends almost entirely on the pulse setting. After a sub-purpuric pulsed dye or IPL session, the face is pink and mildly swollen for a day or two, feels sunburned for an evening, and can be covered with mineral makeup the next morning. After a purpuric pulsed dye session, the treated areas turn a deep blue-purple within minutes and stay that way for seven to fourteen days, with swelling that peaks on the second day and is most dramatic around the eyes; this is a planned effect, not a complication, and it is why the piece on injectables before a big event logic applies here too: nothing purpuric within three weeks of a wedding. Treated vessels may look darker or more visible for a few days before they fade. Crusting is uncommon and usually means the fluence was high. Blistering, whitening of the skin during the pulse, or a burning pain that does not settle within the hour are signs of epidermal injury, and the patient should be back in the office the same day. Sun avoidance for two weeks before and after is not optional; a tan is melanin, melanin absorbs the light meant for the vessel, and a tanned face is the single most common reason a session ends with a footprint pattern or a burn. Patients with a history of cold sores should be covered with an antiviral around any full-face treatment, as the piece on herpes reactivation after procedures explains, since the heat and the disruption are enough to wake the virus.

The complication list, in a properly selected patient treated by a properly trained operator, is short and mostly temporary: purpura when it was not intended, swelling, transient darkening of the skin that fades over weeks to months and is far more common in skin with more melanin, transient lightening that usually but not always recovers, the rectangular IPL footprints described above, and, rarely, blistering that heals with a small scar. The catastrophic complications are eye injury from treatment inside the orbit without shields and full-thickness burns from a Nd:YAG at a fluence meant for a lighter face. Both are operator errors, and both are why the question of who is holding the handpiece belongs in every consultation.

Cost is modest per session and meaningful per year. A pulsed dye laser session for the full face in Los Angeles runs a few hundred dollars, commonly somewhere between three hundred and seven hundred depending on the practice and the area treated; a KTP session for a handful of individual vessels is often less; an IPL session is in the same range, and the American Society of Plastic Surgeons' national procedural statistics have for several years listed the average physician fee for an intense pulsed light treatment at a bit under five hundred dollars. A first-year plan for diffuse rosacea redness, at four sessions plus one maintenance visit, plus a prescription vasoconstrictor that may or may not be covered, lands somewhere between fifteen hundred and three thousand dollars, and the piece on what a cosmetic quote actually covers applies in miniature: ask whether the number is per session or per course, whether a touch-up is included, and whether the consultation fee is credited. Insurance almost never pays for the laser treatment of rosacea or sun-induced telangiectasia, which it classifies as cosmetic regardless of how the patient feels about her face, though it commonly does cover pulsed dye laser treatment of port-wine birthmarks and occasionally covers rosacea treatment with extensive documentation of medical impact. Anyone whose office promises coverage should be asked to put the authorization in writing.

Who should not be lasered, at least not yet: the patient with a fresh tan or a recent self-tanner; the patient with active pustules who has not been treated medically; the patient with untreated melasma who is being offered IPL; the patient on a photosensitizing drug who cannot avoid the sun for two weeks, a category that ironically includes full-dose doxycycline; the patient with a flush and no fixed redness; the patient who cannot name what the device is or who will be operating it; and the patient with any of the red flags from the first section who has not seen a physician. The piece on why a second consultation is worth the trouble argues the case in general terms, and the red face is a place where it applies with unusual force, because the first office a redness patient walks into is very often the one with the brightest sign and the cheapest machine.

The honest summary

• A broken capillary is a dilated vessel, not a damaged one. It is intact, permanent, and immune to creams; the only thing that removes it is heat delivered precisely enough to coagulate it, after which the body clears it.
• The red face has three components and one usual cause. Discrete telangiectasia, diffuse background erythema, and transient flushing, most often produced by rosacea or accumulated sun; a plan that does not say which component it is treating is a sales pitch.
• Every device is selective photothermolysis with a different wavelength. The pulsed dye laser at 595 nm is the targeted tool for facial redness; the KTP at 532 nm traces fine threads on fair skin; the Nd:YAG at 1064 nm reaches deep blue vessels and dark skin; IPL is a broad, imprecise, versatile flashlamp that most offices own and many misuse.
• The laser cannot touch flushing and cannot stop new vessels. Rosacea keeps making telangiectasia, retreatment every year or two is normal, the prescription vasoconstrictors and anti-inflammatories handle what the laser cannot, and daily mineral sunscreen is the foundation of all of it.
• Match the device to the vessel and the skin, then ask who is holding it. Discrete threads are one or two sessions with little downtime, diffuse redness is three to five with maintenance, purpuric settings mean two weeks of bruising by design, eye shields are mandatory inside the orbit, a session costs a few hundred dollars, a year costs a few thousand, and insurance pays for almost none of it.

Facial redness is the most common skin complaint in cosmetic medicine and the one most often treated by a machine chosen before the face was examined. The vessels are real and the lasers that destroy them are good at it. The redness that comes back is not a failure of the laser; it is a failure to name the condition that produced the vessels and to treat it alongside. A patient who leaves a consultation knowing which of her three kinds of redness is being treated, with which wavelength, by whom, and for how long, has done the single most useful thing she can do to make sure the money buys a clearer face and not a recurring appointment.