Blisters or Burns After Laser Treatment: What to Do in the First 24 Hours and When to Get Help

Blisters, weeping skin or sharply outlined red patches after a laser session usually mean the skin received more heat than intended. Cool the area under running water, put nothing on it, and contact the clinic that treated you the same day. This page explains what a laser burn looks like, the first 24 hours, what not to apply, and the signs that need emergency care.

Is a blister after laser normal?

Usually not. Small blisters can be part of healing after a deep peel or fully ablative resurfacing, and your clinic will have warned you if so; after a non-ablative fractional laser, a pigment or vascular laser, IPL or laser hair removal, blistering generally means the skin received more heat than intended and should be seen by the treating doctor the same day. The first hours shape the final result. Skincare is for later: once the skin has fully closed and your doctor clears you to resume products, a hydrating serum such as True Glow Post Laser Intensive Recovery Serum is a common choice for the dry weeks that follow, but no cosmetic product belongs on blistered or broken skin.

What a laser burn looks like

A laser burn shows up as a sharply defined area of redness or blistering that matches the shape of the handpiece or the pattern of the pulses, and it often looks worse several hours after the session than it did in the room. A review of laser complications in Facial Plastic Surgery explains that continuous-wave and quasi-continuous devices can spread heat into normal skin beyond the target, the mechanism behind most of these injuries.

In Asian and darker skin, redness is harder to see; rely on swelling, heat, tenderness and blistering, and expect a higher risk of pigment change afterwards. A review of fractional laser complications in Dermatologic Surgery notes that complications are more frequent in darker skin and in sensitive areas such as the neck. Anything from the second row down means contacting your treating doctor today.

The first 24 hours: what to do

Cool it, cover it loosely if advised, photograph it, and call the clinic that treated you. NHS first-aid guidance for burns is to hold the area under cool running water for 20 minutes as soon as possible and within three hours, using cool bottled water or a wet towel if running water is not available; to remove jewellery near the area; and, once cooled, to lay cling film over the burn rather than wrapping it. Standard first-aid teaching is to use cool, not iced, water; ice on the skin can deepen the injury. Then:

• Take clear photos in daylight and note the device and treatment time.
• Contact your treating clinic the same day. Most will want to see you; any dressing or treatment is the doctor's decision, not something to improvise at home.
• Keep the area clean and loosely covered as the clinic directs. Do not burst blisters; intact blisters protect the skin underneath.
• If you cannot reach the clinic and the burn is on the face, blistering, or larger than your palm, go to an emergency department or urgent care.

Pain relief, dressings and medicines are for your doctor or pharmacist to advise.

What not to put on a laser burn or blister

Nothing except cool water until a doctor has seen the burn. The NHS is explicit that creams, oils and butter should not be put on burns; the same applies to everything below.

• Home remedies: toothpaste, butter, oils, honey, aloe from the plant, essential oils, vinegar or herbal pastes.
• Leftover steroid, antibiotic or other prescription creams, unless your doctor tells you to use them.
• Cosmetic serums and moisturisers, including ours; a product designed for closed, recovering skin has no place on an open burn.
• Makeup, sunscreen or concealer on blistered or weeping skin.
• Exfoliants, retinoids, acids, vitamin C or brightening actives near the area until your doctor restarts them.
• Plasters or sticky dressings on the burn, and tight wraps.
• Heat of any kind: hot showers on the face, saunas, steam, hair dryers, swimming or sweaty exercise.
• Sun exposure, including through a car window, until the area has healed and your doctor has cleared sunscreen.

Our checklist of what not to do after laser covers the general rules; a burn makes every one stricter.

Scarring and pigment change: why early review matters

Most superficial laser burns heal without a permanent mark when kept clean, left alone and reviewed early; the risk of scarring and lasting pigment change rises when a burn is deep, infected, picked, or exposed to sun while healing. The Facial Plastic Surgery review concludes that side effects can be significantly reduced if diagnosed and treated promptly, and a 2026 review in the Journal of the German Society of Dermatology lists pigmentary changes and scarring among the late complications that post-procedure care aims to prevent. For Fitzpatrick III to V skin, the most likely lasting effect is a patch darker, or sometimes lighter, than the surrounding skin; our guides to post-inflammatory hyperpigmentation and dark patches after laser explain what to expect. Thickened, raised or persistently red areas weeks after a burn are early signs of a hypertrophic scar and should be shown to your doctor without delay, because early treatment options are wider than late ones.

Seek care urgently if…

Go to an emergency department (in Singapore, call 995 for an ambulance if needed), without driving yourself, if any of these apply:

• The burn is large or deep, or the skin looks white, grey, waxy, leathery or charred, or feels numb.
• The burn involves the eyelids or eye, lips, ears or neck, or blisters are spreading beyond the treated area.
• A high temperature, chills, a fast heartbeat or breathing, dizziness, confusion or cold, clammy skin, which can signal spreading infection.
• Swelling of the lips, tongue or throat, wheeze or difficulty breathing.
• Severe pain that is not easing, or pain increasing after the first day.
• Pus, yellow-green crusts or an unpleasant smell from the area; see signs of infection after laser.

The NHS advises emergency assessment for any burn on the face, so if your treating clinic cannot see you promptly, an emergency department or urgent care clinic is the right place.

Recovering after a laser burn

Healing follows the same path as any burn: weeping and crusting first, new pink skin next, then weeks of pigment settling. Follow your doctor's wound plan exactly, attend every review, and do not restart skincare until they say the skin has closed. Then the priorities are gentle cleansing, fragrance-free hydration and a broad-spectrum sunscreen every morning, with a hat outdoors, because new skin pigments easily for months. Reintroduce actives one at a time when your doctor agrees. Our guides to skin recovery after CO2 laser and serums after ablative laser resurfacing describe the hydration stage. Before any future laser session, tell the clinic about the burn and ask about a test patch.