IPL (intense pulsed light)

Also known as: photofacial, photorejuvenation, BBL, broadband light

IPL is not a laser but a broad-spectrum flash lamp with filters that target hemoglobin (redness) and melanin (brown spots). Its best evidence is for the redness and visible vessels of rosacea and for sun-induced brown spots, where multiple trials show meaningful clearance over 3 to 5 sessions. For wrinkles and acne the data is thinner, and photofacial marketing tends to promise full-face rejuvenation that the studies only partially back up.

How it works

Pulses of filtered light (roughly 500 to 1200 nm) are absorbed by colored targets in the skin: hemoglobin in dilated vessels and melanin in pigmented spots. The absorbed energy heats and destroys those targets while sparing surrounding tissue. Treated spots typically darken and flake off over about a week; vessels collapse and are resorbed.

What the evidence says, claim by claim

These are the results measured in studies, not the results shown in ads. Where the research is weak, the grade says so.

For rosacea and redness

Moderate evidence

A 2022 systematic review and a 2024 meta-analysis (4 comparative studies, 141 participants) found IPL performs on par with pulsed dye laser, the reference device, for facial erythema and telangiectasia, with no significant difference in achieving over 50 percent clearance. Studies consistently show improvement after 3 or more sessions with transient side effects. Note this treats the visible redness, not the underlying rosacea, so maintenance sessions are usual.

Randomized trials support this use, but they are few, small, or short. The effect is probably real. The size of it is less certain.

Pulsed dye laser versus intense pulsed light for facial erythema of rosacea: a systematic review and meta-analysis (Journal of Dermatological Treatment, 2022; meta-analysis)
Meta-Analysis of the Efficacy of Intense Pulsed Light and Pulsed-Dye Laser Therapy in the Management of Rosacea (Journal of Cosmetic Dermatology, 2024; meta-analysis)

For dark spots and hyperpigmentation

Moderate evidence

A 2025 systematic review of clinical trials for solar lentigines reported IPL success rates in the 74 to 90 percent range, with less post-inflammatory hyperpigmentation than cryotherapy. In a hand lentigines study, 62 percent of patients got more than 50 percent improvement. This applies to discrete sun spots in lighter skin; IPL is a poor and often risky choice for melasma, which can worsen with light-based heat.

Randomized trials support this use, but they are few, small, or short. The effect is probably real. The size of it is less certain.

Treatment of Solar Lentigines: A Systematic Review of Clinical Trials (Journal of Cosmetic Dermatology, 2025; systematic-review)
Clinical effectiveness of intense pulsed light therapy for solar lentigines of the hands (Dermatologic Therapy, 2011; clinical-trial)

For wrinkles and fine lines

Limited evidence

A 2021 systematic review of 16 studies (637 participants, average 4.3 sessions) reported improvements in texture, pores, and fine rhytids alongside the stronger vascular and pigment effects, but most included studies were uncontrolled with subjective grading. IPL delivers gentle collagen stimulation at best; it does not approach fractional laser resurfacing for established wrinkles, despite photorejuvenation branding.

Only small, short, or lower-quality studies exist. Treat marketing claims about this use with caution.

Intense Pulsed Light on skin rejuvenation: a systematic review (Archives of Dermatological Research, 2021; systematic-review)

For acne

Limited evidence

A 2020 meta-analysis pooled 8 RCTs (450 patients) and found IPL can reduce inflammatory acne lesions, but the trials were small, short, and heterogeneous in device settings, and IPL is not part of standard acne guidelines. It may be a reasonable adjunct for someone already getting IPL for redness, not a primary acne therapy.

Only small, short, or lower-quality studies exist. Treat marketing claims about this use with caution.

Efficacy of IPL therapy for the treatment of acne vulgaris: A meta-analysis (Journal of Cosmetic Dermatology, 2020; meta-analysis)

Risks and what can go wrong

Minimal downtime: redness for a few hours to 2 days, and treated brown spots darken then flake over about a week. Risks include blistering, post-inflammatory hyper- or hypopigmentation, and rare scarring, all more likely in tanned or darker skin because melanin in normal skin competes for the light energy. Many practices decline IPL for Fitzpatrick V to VI. Avoid with a recent tan, photosensitizing medications, or melasma-prone skin without specialist judgment.

The practical details

Typically 3 to 5 sessions spaced 3 to 4 weeks apart, then maintenance 1 to 2 times per year. US pricing commonly runs 300 to 600 dollars per full-face session. In-office; home IPL devices exist mainly for hair removal at far lower energies.