Once a sunburn blister pops, the raw skin underneath needs gentle cleaning, a moisture barrier, and a protective covering. That exposed layer of skin is essentially an open wound, and treating it properly helps it heal faster while lowering your risk of infection. Most popped sunburn blisters take several weeks to fully heal, so what you do in the first hours and days matters.
Clean the Area First
Before you put anything on a popped blister, wash the area gently with mild soap and cool water. Don’t scrub. If any loose skin is still hanging from the blister, leave it in place. That flap of dead skin actually acts as a natural bandage, protecting the tender new skin forming underneath. Pat the area dry with a clean towel rather than rubbing.
What to Apply to the Raw Skin
Plain petroleum jelly is the best thing to put on a popped sunburn blister. It creates a moisture barrier that keeps the wound from drying out and cracking, which speeds healing and reduces pain. You don’t need anything fancier.
You might assume antibiotic ointment would be a better choice, but research published in the Journal of Drugs in Dermatology found that antibiotic ointments offer no healing advantage over plain petroleum jelly. Worse, the antibiotics commonly found in these products (the active ingredients in brands like Neosporin) are known to cause contact dermatitis, meaning they can actually irritate your already damaged skin. Plain petroleum jelly is the preferred option.
Aloe vera gel is another reasonable choice, particularly pure aloe vera products that have been properly processed. Safety reviews indicate the risks of using aloe vera on wounds are low, though you should test it on a small patch of unaffected skin first to make sure you don’t react to it. If your blister is large or the skin is deeply raw, petroleum jelly is the safer bet because commercial aloe products vary widely in purity.
Cover It With a Non-Stick Bandage
After applying petroleum jelly, cover the area with a non-stick bandage. Regular adhesive bandages or gauze pads can bond to the raw, weeping skin and tear the new tissue off when you change the dressing. Non-stick wound pads (sometimes labeled “non-adherent”) are specifically designed to prevent this. You can secure them with medical tape on the surrounding healthy skin.
Change the bandage once or twice a day, reapplying a thin layer of petroleum jelly each time. If the bandage gets wet or dirty, change it right away.
What Not to Put on It
Some common sunburn products are actively harmful on broken skin:
- Benzocaine or lidocaine sprays and creams. These numbing agents, found in many over-the-counter sunburn relief products, can trigger allergic reactions and make the burn worse. Check ingredient labels carefully.
- Butter, coconut oil, or other heavy oils. These trap heat in the skin and create a breeding ground for bacteria on an open wound.
- Rubbing alcohol or hydrogen peroxide. Both damage the fragile new cells trying to grow and slow healing.
Managing Pain and Swelling
A popped sunburn blister can be surprisingly painful. Over-the-counter ibuprofen or acetaminophen both help. Ibuprofen has the added benefit of reducing inflammation, which is a major driver of sunburn pain. Cool (not ice-cold) compresses laid gently over the bandaged area can also take the edge off. Don’t apply ice directly to the blister.
Drink extra water. Sunburn pulls fluid toward the skin’s surface, which is partly why blisters form in the first place. A blistering sunburn is a second-degree burn, and your body needs more hydration than usual while it repairs the damage.
How Long Healing Takes
A popped sunburn blister typically takes several weeks to fully heal. In the first few days, the area will be red, tender, and may ooze clear fluid. Over the next week or two, new skin gradually forms underneath. That new skin will be pink, thin, and extremely sensitive to UV light, so keep it covered or use strong sun protection even after it no longer hurts.
If the skin isn’t getting better after a week, or if you have blisters covering a large portion of your body, that’s worth professional evaluation. Large second-degree sunburns sometimes need medical treatment beyond home care.
Signs of Infection to Watch For
An open blister is vulnerable to bacteria. Check the area daily when you change your bandage. Signs that the wound has become infected include pus that is green or yellow (clear fluid is normal), skin around the blister that feels hot to the touch, increasing redness that spreads outward from the wound, red streaks extending away from the blister, or a foul smell. On darker skin tones, redness can be harder to spot, so pay extra attention to warmth, swelling, and the color of any drainage.