The best thing to put on most blisters is a simple protective covering that keeps the skin intact and the area clean. For a standard friction blister, that means leaving the raised skin (the “roof”) in place, gently cleaning the area, and covering it with a bandage that cushions without sticking. What you use depends on the blister’s size, location, and whether it’s still intact or has already torn open.
Leave the Roof On
The fluid inside a friction blister is sterile, and the layer of skin over it acts as a natural barrier against bacteria. Popping or peeling that skin away removes your best protection and slows healing. In most cases, the fluid reabsorbs on its own within a few days as new skin forms underneath.
If the blister is large, painful, or in a spot where it’s likely to rupture on its own (the sole of your foot, for example), you can drain it carefully. Sterilize a needle with rubbing alcohol, puncture the edge of the blister, and let the fluid drain out. Keep the overlying skin in place. Then clean the area and apply a bandage.
Hydrocolloid Bandages
Hydrocolloid bandages (sold under brand names like Compeed or Band-Aid Hydro Seal) are one of the most effective coverings for blisters. The inner layer contains gel-forming materials that absorb fluid from the wound and create a moist environment underneath. That moisture speeds up tissue regrowth, reduces pain, and prevents the bandage from sticking to raw skin. When you eventually remove it, you won’t tear off the new skin forming beneath.
These bandages also seal the wound from dirt, debris, and bacteria while maintaining a slightly acidic environment that discourages bacterial growth. They work well on both intact blisters and ones that have already opened. You can leave a hydrocolloid bandage on for several days until it starts peeling off at the edges, which means fewer painful bandage changes.
Standard Bandages and Gauze
If you don’t have hydrocolloid bandages, a regular adhesive bandage works fine for small blisters. For larger ones, use a non-stick gauze pad secured with medical tape. The key word is “non-stick.” Standard gauze can bond to a raw blister as it dries, and pulling it off damages the new skin underneath. Look for pads labeled “non-adherent” or apply a thin layer of petroleum jelly (plain Vaseline) to the wound before covering it. The petroleum jelly keeps the area moist and prevents sticking.
Moleskin for Weight-Bearing Blisters
Blisters on the bottom of your foot or the back of your heel face constant pressure, which makes them harder to protect with a flat bandage alone. A donut-shaped moleskin pad solves this by redistributing pressure away from the blister. Cut a piece of moleskin large enough to surround the blister, then cut a hole in the center slightly bigger than the blister itself. Stick the moleskin around the blister so the raised skin sits inside the open hole, untouched. You can place a flat bandage or hydrocolloid patch over the top of the whole thing for extra protection.
This technique is especially useful if you need to keep walking or wearing shoes while the blister heals. The surrounding moleskin absorbs the friction and pressure that would otherwise press directly on the damaged skin.
What Not to Put on Blisters
Avoid hydrogen peroxide and rubbing alcohol directly on an open blister. Both kill bacteria, but they also damage the new cells trying to grow and can significantly slow healing. Plain soap and water is all you need for cleaning.
Antibiotic ointments like Neosporin are unnecessary for a clean friction blister unless you see signs of infection. Some people develop contact allergies to the ingredients, which can cause additional irritation around the wound. Petroleum jelly provides the same moisture barrier without the allergy risk.
For burn blisters specifically, skip silver-based burn creams unless directed by a doctor. While these creams have been widely used for larger burns, evidence shows they can actually slow wound healing and require more frequent, more painful dressing changes.
What to Put on a Torn or Open Blister
If the roof of the blister has already come off, you’re dealing with exposed raw skin that needs a bit more care. Wash the area gently with soap and water, pat it dry, and apply a thin layer of petroleum jelly. Cover with a non-stick bandage or hydrocolloid patch. Change the bandage once a day or whenever it gets wet or dirty, reapplying petroleum jelly each time.
If any loose skin is still attached, leave it. It still provides some protection for the tissue underneath, even if it’s no longer holding fluid. Only trim dead skin that’s bunching up and catching on things, and use clean scissors to do it.
Signs of Infection
Most blisters heal without complications, but watch for yellow or green pus inside or around the blister, increasing redness that spreads beyond the blister’s edges, warmth around the area, or worsening pain after the first day or two. These suggest a bacterial infection that needs medical attention.
A more serious warning sign is a red streak extending away from the blister toward your body, or a rapidly spreading rash with fever. This can indicate the infection is moving beyond the skin and warrants urgent care, ideally the same day if you have a fever, or within 24 hours if the rash is growing but you feel otherwise okay.