An open blister heals best when you keep it clean, moist, and protected from further friction. Most blisters form new skin and close up within 3 to 7 days with proper care. The key mistakes people make are letting the wound dry out, ripping off the loose skin flap, or slathering on products that cause more irritation than healing. Here’s how to handle it right.
Clean the Blister Gently
Start by washing your hands thoroughly with soap and water. Then wash the blister itself with mild soap and water. That’s genuinely all you need for cleaning. You don’t need hydrogen peroxide, rubbing alcohol, or any harsh antiseptic directly on the raw skin, as these can damage the new tissue trying to form underneath.
After washing, you can apply a light antiseptic around the edges of the wound if you’d like, but the soap and water step is doing most of the work. Pat the area dry with a clean towel or gauze rather than rubbing it.
Leave the Skin Flap Alone
If the blister has popped but the loose skin is still partially attached, resist the urge to peel it off. That flap of dead skin acts as a natural bandage, protecting the raw tissue underneath while new skin regenerates. Trim away only the edges that are clearly ragged or catching on things, using small scissors you’ve wiped down with rubbing alcohol.
If the skin flap has already come off completely, don’t worry. You’ll just need to be more careful about keeping the area covered. In clinical settings, nurses will sometimes intentionally remove blister roofs on larger wounds (a process called “de-roofing”) and then dress the wound bed with moist, non-stick dressings. But at home, keeping whatever natural covering remains in place is the simpler, safer approach.
Apply the Right Ointment
A thin layer of plain petroleum jelly is the best thing you can put on an open blister. It keeps the wound moist, which is critical for new skin to form, and it prevents the bandage from sticking to the raw tissue.
You might assume antibiotic ointment would be a better choice, but research consistently shows otherwise. A study published in the Journal of Drugs in Dermatology found no significant difference in infection rates between wounds treated with antibiotic ointment and those treated with plain petroleum jelly. The infection rate for clean wounds is already extremely low (under 1%), so antibiotic ointment doesn’t add meaningful protection. What it does add is a notable risk of contact dermatitis, an allergic skin reaction that can actually slow healing and cause more discomfort. Plain petroleum jelly is the preferred option.
Choose the Right Bandage
Cover the blister with a non-stick gauze pad or bandage. Standard adhesive bandages work fine for small blisters, but make sure the pad portion (not the adhesive) sits over the wound.
Hydrocolloid bandages are a step up if you want faster, lower-maintenance healing. These contain materials that absorb wound fluid and turn it into a gel, creating a consistently moist environment over the blister. That gel layer also prevents the bandage from sticking to the wound, so you won’t tear off new skin when you change it. Research has found hydrocolloid dressings are highly effective at maintaining the right moisture and temperature for healing, supporting new tissue formation, and promoting blood vessel growth in the wound bed. They can also stay on much longer than traditional bandages, sometimes several days, which means less disruption to the healing process.
For blisters on your feet or hands that will keep getting rubbed, moleskin padding adds an extra layer of protection. Cut a piece of moleskin slightly larger than the blister, then cut a hole in the center so it forms a donut shape. Apply it around the blister so the padding absorbs friction without pressing on the wound itself.
How to Care for It Over the Following Days
Change your bandage at least once a day, or whenever it gets wet or dirty. Each time you change it, wash the area again with soap and water, reapply petroleum jelly, and put on a fresh bandage. New skin typically forms underneath within 3 to 7 days.
During this time, try to minimize friction on the area. If it’s a foot blister, wear different shoes or add padding. If it’s on your hand, wear a glove or wrap it before doing the activity that caused it. Every time the raw skin gets rubbed, you’re resetting the healing clock.
You’ll know healing is progressing when the redness around the wound gradually fades, the area feels less tender, and you can see pinkish new skin forming across the base. Once that new skin has fully covered the wound and no longer looks raw or shiny, you can stop bandaging it.
Signs of Infection to Watch For
Most open blisters heal without complications, but infection is the main risk. Watch for these warning signs in the days after the blister opens:
- Expanding redness that spreads beyond the immediate edge of the blister, especially if the red area grows quickly
- Increased warmth and swelling around the wound
- Pus that is yellow, green, or foul-smelling rather than the clear or slightly yellowish fluid that’s normal in early healing
- Increasing pain rather than gradually decreasing tenderness
- Red streaks extending outward from the wound
- Fever or chills
A spreading skin infection (cellulitis) makes the skin painful, red, swollen, and warm to the touch. The skin can develop a pitted, orange-peel texture. If redness is spreading quickly or you develop a fever, that needs prompt medical attention.
Blisters That Need Extra Caution
If you have diabetes or poor circulation in your legs and feet, open blisters carry significantly higher risk. Reduced sensation means you may not feel a blister worsening, and impaired blood flow slows healing and makes infection more likely. Even small sores or blisters can become serious problems if infection develops or they fail to heal. Any open blister on your feet warrants a call to your provider, particularly if you notice redness, increased warmth, swelling, tingling, burning, or pain.
Blisters from burns also deserve more careful treatment than friction blisters. Burn blisters tend to be larger and cover damaged tissue that’s more vulnerable to infection. If a burn blister is bigger than a coin, covers a joint, or resulted from a chemical or electrical burn, professional wound care is a better route than home treatment.