Sunburn Blisters: Should You Pop Them? Safe Treatment
Sunburn blisters mean a second-degree burn. Should you pop them? No — here’s why, how to treat them safely, what to do if one bursts, and when to see a doctor.
Educational sun-care guidance, not medical advice. Blistering sunburn is a second-degree burn — if it’s severe, widespread, or you feel unwell, see the when to seek medical care section below and contact a doctor.
The quick answer
No — don’t pop sunburn blisters. An intact blister is a natural sterile bandage that protects the raw, healing skin underneath. Popping it removes that protection and sharply raises the risk of infection. Leave blisters alone, keep the area cool and clean, manage the pain, and stay out of the sun until it heals.
What a sunburn blister actually means
Small fluid-filled blisters after sun exposure are a sign of a second-degree burn — the UV damage has gone deeper than the surface layer of skin. It usually means you were exposed for well beyond your safe limit. Expect redness, swelling, pain and, a day or two later, the blisters themselves.
Blistering is your body’s repair response: the fluid cushions and protects the new skin forming beneath, and the blister roof keeps bacteria out. That’s exactly why you want to leave it intact. To avoid getting here again, check your skin type and the live UV index, then keep sessions under your limit using the tanning time calculator.
Should you pop them? (No — and why)
It’s tempting to drain a tight, sore blister, but resist it. An open blister is a wound, and broken sunburn blisters are far more likely to become infected than intact ones. Infection slows healing and makes scarring more likely. The intact roof of skin is doing three jobs at once:
- Sealing out bacteria while the skin underneath is raw.
- Cushioning the tender new skin that’s forming.
- Keeping the wound moist, which is the environment skin heals best in.
So don’t pierce, drain, scratch or peel them. If a blister is in a spot that rubs against clothing, cover it loosely with a clean nonstick dressing so it doesn’t tear open by accident.
How to treat sunburn blisters safely
- Cool it down. A cool (not ice-cold) shower, bath or damp compress for 10–15 minutes eases the heat and pain. Don’t apply ice directly to skin.
- Leave the blisters intact. No popping, no peeling. Let them drain naturally if they break on their own.
- Manage the pain. An over-the-counter anti-inflammatory like ibuprofen (taken as directed) helps with pain and swelling.
- Soothe the surrounding skin. Pure aloe vera gel or a plain, fragrance-free moisturiser on the unbroken skin around the burn. Avoid “-caine” numbing sprays (benzocaine/lidocaine), which can irritate or trigger reactions.
- Rehydrate. Burns pull fluid to the skin’s surface, so drink extra water.
- Protect it from the sun. Keep the area fully covered until it’s healed — re-burning healing skin is both painful and risky. When you’re back outdoors, plan coverage with the SPF calculator and our guide to choosing the right SPF.
For the full step-by-step on a blistering or non-blistering burn, see the pillar guide on how to treat sunburn.
What to do if a blister bursts
If a blister breaks on its own, treat it as a small open wound — but don’t pull off the loose flap of skin; it still helps protect what’s underneath.
- Clean it gently with mild soap and water.
- Apply a thin layer of plain petroleum jelly (Vaseline) to keep it moist. Skip antibiotic ointments unless a doctor advises them — some people react to them.
- Cover with a clean nonstick bandage (a non-adhesive pad), changing it daily or whenever it gets wet or dirty.
- Watch for infection as it heals (see below).
When to see a doctor
Most blistering sunburn can be cared for at home, but get medical help promptly if any of these apply:
- Blisters cover a large area of the body.
- The burn is on the face, lips, eyes or genitals.
- You have fever, chills, headache, nausea, dizziness, confusion or faintness — these can signal sun poisoning, dehydration or heat illness.
- Signs of infection: increasing pain, swelling or redness spreading out from a blister, warmth, pus or yellow drainage, or red streaks running from the area.
- The burn isn’t improving after a few days, or you’re worried about it.
Seek emergency care for a severe sunburn alongside a very high temperature, confusion, fainting, or signs of dehydration that don’t improve.
Preventing the next one
The only sure way to avoid blistering is to never burn in the first place. Stay well within your safe time, favour the gentler hours, and reapply sunscreen — start with how to tan safely without burning, check the live UV index, and set a hard limit with the tanning time calculator.
This is general, educational sun-care guidance, not medical advice. Blistering sunburn is a second-degree burn; if it’s severe, on the face or genitals, covers a large area, looks infected, or comes with fever or feeling unwell, contact a doctor.