IPL for thread veins: results, sessions and limits

Thread veins, the small dilated vessels you can see through the skin, are one of the most common things people bring to a consultation. IPL is usually the treatment they have read about. It does work on some thread veins, and it works poorly or not at all on others, and the difference is not subtle. It comes down to where the vein is and what colour your skin is.

What IPL actually does to a vein

IPL is not a laser, and the distinction matters. A laser emits a single wavelength. IPL is a flashlamp emitting a broad band of wavelengths, filtered down to a useful range. That light is absorbed by haemoglobin inside the vessel and converted to heat, which damages the vessel wall so the body clears it over the following weeks.

Two things follow from that mechanism. First, a treated vein does not disappear while you are lying on the couch. It fades as it is broken down, which takes weeks, so judging the result the next morning tells you very little. Second, haemoglobin is not the only thing in skin that absorbs this light. Melanin absorbs it too, and that single fact explains most of the limits that follow.

What the evidence shows for facial thread veins

Reasonably encouraging, with a caveat attached. A 2024 systematic review in the Indian Journal of Dermatology, Venereology and Leprology pooled 14 studies of IPL in rosacea, where visible facial vessels are part of the picture. Most reported improvement in both redness and visible vessels, and one reported clearance of facial telangiectasia in around 78 per cent of cases. Side effects across the studies were transient: redness, swelling, mild bruising and a burning sensation that settled within days.

The caveat is that the review judged the methodological quality of the included studies to be poor, with eight of the fourteen lacking blinding or proper concealment. Direct comparisons against pulsed dye laser, the other common device for facial vessels, are few. In one such comparison redness fell by about 60 per cent on the IPL side against 45 per cent for pulsed dye laser, which is a single study rather than a settled answer.

So the honest position for facial thread veins is that IPL has a real effect that shows up consistently across studies, and that the studies themselves are not strong enough to promise you a number. You can read more about how we use IPL and what we assess before using it.

Why leg thread veins are a different conversation

This is the part that tends to surprise people, so it is worth stating plainly. The 2021 Cochrane review of treatments for telangiectasias and reticular veins, covering 35 randomised trials and 3,632 participants, did not include a single trial of intense pulsed light. It was simply not among the treatments investigated. What the review did find is that sclerosing agents outperform placebo, that no one sclerosant clearly beats another, and that adding laser to sclerotherapy may improve on sclerotherapy alone.

There is a second reason leg veins need separate handling. Leg thread veins are often fed by larger vessels further up, and treating what you can see without assessing what is underneath tends to be followed by their return. That assessment is a vascular one, and it comes before any device.

The Cochrane review is also worth knowing for a reason that has nothing to do with IPL: hyperpigmentation and matting, which means new tiny vessels appearing near the treated area, were both more common with sclerosing agents than with placebo. Whichever route you take with leg veins, that is part of the picture.

Sessions, and what results honestly means

Published facial protocols generally run three to four sessions spaced three to four weeks apart, with some studies using as few as one and as many as seven. For context on expectations, the NHS Scotland referral protocol that governs the small number of cases funded on the NHS caps a course at six sessions and states outright that treatment may lead to incomplete resolution despite multiple sessions. That is a health service being candid, and it is the right expectation to hold.

So results means meaningful fading of the vessels you have now. Some vessels respond well, some respond partly, and some do not respond. IPL also does nothing about the tendency that produced them, so new thread veins forming over the years is normal rather than a sign the treatment failed. We photograph the area under the same lighting at each visit, because progress here is genuinely difficult to judge from a mirror and memory.

Who IPL does not suit

Darker skin tones are the biggest one. Because melanin competes with haemoglobin for the same light, higher Fitzpatrick skin types carry a greater risk of burns and of pigment change, which can leave lighter or darker patches that are harder to treat than the original vein. For many people with deeper skin tones IPL is the wrong device, and saying so is more useful than test patching our way toward a problem. The same physics governs the pigmentation work this platform is also used for.

Beyond that, IPL is not appropriate with a recent tan, whether from sun or from a bottle, in pregnancy, while taking photosensitising medication or with a photosensitive condition, over active infection or a cold sore in the area, or on inflamed skin. A history of keloid scarring needs discussing first.

Two more. Any red mark that bleeds, crusts, changes shape or does not behave like a thread vein needs a diagnosis before light goes anywhere near it, because treating an undiagnosed lesion removes the evidence rather than the problem. And anyone hoping a single session will clear the area is going to be disappointed, which is a reason to have the conversation before booking rather than after.

Working out whether it applies to you

That is what the assessment is for, and it is free. Our 30 minute consultation covers where the vessels sit, whether they are the sort IPL treats well, whether your skin tone makes a different device or a different approach more sensible, and whether leg veins need a vascular opinion first. If we think IPL is a poor fit for you, our clinical team will say so. Book a free consultation online.

Nova Beauty Clinic, East Finchley, London.