In short
- Intense pulsed light treats the vascular component: diffuse erythema and dilated superficial vessels. Rosacea, as a disease, is not cured.
- The largest systematic review on the subject — 152 studies and 20,944 participants — assigns laser and intense pulsed light a low to moderate certainty of evidence for erythema and above all telangiectasia.
- A meta-analysis comparing IPL with pulsed dye laser, with 4 studies and 141 participants, finds no clear superiority for either: IPL had the advantage in clearance above 75% and the dye laser proved less painful.
- Papules and pustules are not the province of light: that component has medical treatments and its management is dermatological.
- A sensible plan starts with three or four sessions several weeks apart and is then reviewed; the published average in IPL photorejuvenation is 4.29 sessions.
- The triggers are still there after treatment: sun, heat, alcohol and sudden changes of temperature are not switched off by any machine.
Intense pulsed light acts on the haemoglobin in vessels, so its natural territory is redness: diffuse flushing of the cheeks, fine vessels visible one by one and the vascular component of rosacea. Now the part that is almost never said clearly: rosacea is not cured. It is a chronic disease, and what intense pulsed light treats is its vascular component, not the disease.
That distinction is not a quibble: it changes what can be expected, how the treatment is planned and why maintenance is part of the plan from day one.
This page expands on the vascular indication for intense pulsed light. If what concerns you is brown patches and not redness, the page for you is IPL for sun spots and lentigines.
Three different things under the word “redness”
When someone says “my face is red” they may be describing three situations that are not treated in the same way.
- Diffuse erythema. A widespread redness, with no vessels identifiable to the naked eye, that intensifies with heat, exercise, alcohol or emotion. It is the red background of the cheek.
- Telangiectasia. Dilated vessels that can be made out one by one, as fine red or purplish lines, especially on the sides of the nose and the cheeks. It is what are popularly called thread veins.
- The inflammatory component of rosacea. Papules and pustules, that is, raised lesions sometimes with contents. This is not a problem of colour: it is inflammation, and its treatment is medical.
Intense pulsed light works on the first two. On the third it does not, and presenting it as a treatment for “whole” rosacea is where disappointment begins.
What the evidence says, and with what certainty
Here it is worth being exact, because the difference between “there is evidence” and “there is high-certainty evidence” is precisely what separates honest information from a sales argument.
The largest updated systematic review of interventions in rosacea, which included 152 studies and 20,944 participants and assessed the certainty of the evidence with the GRADE system, concludes that for erythema and mainly for telangiectasia there is low to moderate certainty evidence for treatment with laser and intense pulsed light. That same review reserves high certainty evidence for certain topical treatments of persistent redness.
On the direct comparison between the two most used vascular technologies, a 2024 meta-analysis brought together 4 studies and 141 participants setting intense pulsed light against pulsed dye laser. Its results:
- For clearance above 50%, no significant difference between the two.
- For clearance above 75%, intense pulsed light showed significantly higher rates.
- For change in the erythema index, similar results between the two.
- For pain, the pulsed dye laser scored markedly lower.
The authors themselves warn that the literature directly comparing the two therapies is limited and that larger, better designed studies are needed. With 141 participants in total, that warning is the most important thing in the study.
The practical reading: intense pulsed light is a reasonable option for the vascular component, the choice between one technology and the other depends more on the case and on tolerance of pain than on any demonstrated superiority, and anyone presenting either of them to you as the definitive solution is running ahead of the data.
What light does not do
- It does not cure rosacea. It is a chronic disease; what is treated is its vascular expression.
- It does not treat papules or pustules. That component has medical treatments with proper support and its management is dermatological: at ICPM inflammatory rosacea is referred to dermatology, it is not treated here. If your rosacea comes in flares, the right order is usually to control the inflammation first and consider light afterwards, on whatever red background is left.
- It does not replace managing the triggers. Sun, heat, alcohol, very hot or spicy food and sudden changes of temperature go on acting just the same after treatment.
- It does not treat texture, scars or laxity. That comparison is in the comparison between CO₂ and intense pulsed light.
How many sessions, and why maintenance comes up
The systematic review of IPL in skin rejuvenation reports an average of 4.29 sessions, with a range of 3 to 7, and expressly points out that there is no consensus on the parameters and that nine of its sixteen studies were of low methodological quality.
Applied at the appointment: three or four sessions several weeks apart are proposed and the response is reviewed before deciding whether to carry on.
And maintenance, which is the part worth accepting from the start: since the disease is still there and so are the triggers, the vascular component tends to come back. The aim is not to “finish the treatment”, but to keep the face at a point you find acceptable with as few sessions as possible.
A clinic that sells you a fixed course of twelve sessions before examining your skin is working to a commercial criterion, not a clinical one.
When it is not indicated and when we refer on
It is not carried out:
- on tanned skin, with recent or planned sun exposure, or with fake tan;
- on photosensitising medication;
- with an active infection in the area;
- on undiagnosed pigmented lesions;
- in pregnancy, as a precaution;
- when what is wanted is treatment of texture, scars or laxity.
And we refer to dermatology when:
- the inflammatory component predominates, with flares of papules and pustules;
- there is ocular involvement — itching, a gritty sensation, a red eye — which is frequent in rosacea and has its own management;
- the diagnosis is not clear: not every red face is rosacea.
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Frequently asked questions
Does intense pulsed light cure rosacea?
No. Rosacea is a chronic disease. Intense pulsed light treats its vascular component — the redness and the dilated vessels — not the disease.
How much evidence is there that it works?
The largest systematic review, with 152 studies and almost 21,000 participants, assigns laser and intense pulsed light a low to moderate certainty of evidence for erythema and above all telangiectasia. That is real support, but not high certainty, and it is worth knowing before deciding.
Which is better, intense pulsed light or pulsed dye laser?
The only meta-analysis comparing them directly includes 4 studies and 141 participants: intense pulsed light had better rates of clearance above 75% and the dye laser proved less painful, with no differences in the erythema index. With that sample, there is no basis for declaring a winner.
How many sessions do I need?
The published average in IPL photorejuvenation is 4.29 sessions, in a range of 3 to 7. Three or four are proposed and then reviewed.
Do I have to keep repeating it for ever?
The vascular component tends to come back, because the disease and the triggers are still there. Maintenance is part of the plan, and how often depends on the individual case.
I have spots as well as redness — will it get rid of them?
No. Papules and pustules are the inflammatory component and they have medical treatment. The usual approach is to control the inflammation first and consider light afterwards, on the red background.
Does it hurt?
It is described as a brief snap, and in the published comparison with pulsed dye laser, intense pulsed light proved somewhat more uncomfortable. It is tolerable in most cases.
My face goes red when I exercise or drink wine — will that go away?
The red background can be reduced, but vascular reactivity to the triggers does not disappear with treatment. It is one of the expectations worth adjusting before starting.
Sources
- van Zuuren EJ, Fedorowicz Z, Tan J, et al. Interventions for rosacea based on the phenotype approach: an updated systematic review including GRADE assessments. Br J Dermatol. 2019;181(1):65-79. One hundred and fifty-two studies and 20,944 participants; for erythema and mainly telangiectasia, low to moderate certainty evidence for laser and intense pulsed light. https://pubmed.ncbi.nlm.nih.gov/30585305/
- Zhai Q, Cheng S, Liu R, Xie J, Han X, Yu Z. Meta-Analysis of the Efficacy of Intense Pulsed Light and Pulsed-Dye Laser Therapy in the Management of Rosacea. J Cosmet Dermatol. 2024. Four studies and 141 participants; IPL achieved higher rates of clearance above 75%, the erythema index was similar and the pulsed dye laser proved less painful; the authors point out that the comparative literature is limited. https://pubmed.ncbi.nlm.nih.gov/39240125/
- Sales AFS, Pandolfo IL, de Almeida Cruz M, et al. Intense Pulsed Light on skin rejuvenation: a systematic review. Arch Dermatol Res. 2022. Sixteen studies and 637 participants; average of 4.29 sessions (range 3–7); results in telangiectasia and erythema; no consensus on parameters and nine studies of low methodological quality. https://pubmed.ncbi.nlm.nih.gov/34609598/
- Hu S, Atmakuri M, Rosenberg J. Adverse Events of Nonablative Lasers and Energy-Based Therapies in Subjects With Fitzpatrick Skin Phototypes IV to VI: A Systematic Review and Meta-Analysis. Aesthet Surg J. 2022;42(5):537-547. Forty-three studies and 1,654 subjects; post-inflammatory hyperpigmentation 8.1% and prolonged erythema 0.6% across all devices; IPL and radiofrequency carry a minimal risk of hyperpigmentation compared with diode and erbium lasers. https://pubmed.ncbi.nlm.nih.gov/35019139/
Book your consultation
If you have had a red face for years and do not know whether what you have is rosacea, dilated vessels or simply reactive skin, what settles the question is a face-to-face assessment: the skin is examined, which component predominates is determined, and we decide whether intense pulsed light, medical treatment or both in a particular order is what is called for.
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Last reviewed: 23 August 2026. This content is for information only and does not replace an individual assessment by a healthcare professional.
