Once a blister has popped, your top priority is keeping the raw skin underneath clean, moist, and protected from bacteria. Most popped blisters heal within one to two weeks without complications, but how you treat it in the first few hours and days makes a real difference in healing speed and infection risk.
Clean the Area Right Away
Wash your hands first, then gently clean the blister and surrounding skin with mild soap and lukewarm water. Pat the area dry with a clean towel or gauze. Avoid using hydrogen peroxide or rubbing alcohol directly on the open wound, as these can damage the new tissue forming underneath.
Leave the Skin Flap in Place
This is the part most people get wrong. That loose, deflated piece of skin still serves a purpose. It acts as a natural bandage, shielding the raw tissue beneath from bacteria and friction. Don’t peel it off or trim it right away. Instead, gently press the flap back down over the exposed skin after cleaning.
Research on blister management supports keeping the roof intact when possible. Removing it exposes the wound surface, which can increase pain and may promote bacterial colonization. After several days, once new skin has started forming underneath, you can use sterilized scissors (wiped with rubbing alcohol or an antiseptic) to carefully trim away the dead skin that’s dried out and started peeling on its own.
Apply Ointment and Cover It
After cleaning, apply a thin layer of petroleum jelly or antibiotic ointment to keep the wound moist. In a study comparing treatments on blister wounds contaminated with staph bacteria, a triple antibiotic ointment led to faster healing (averaging nine days) and was the only treatment that effectively eliminated bacterial contamination within 16 to 24 hours. If you don’t have antibiotic ointment on hand, plain petroleum jelly still works well by keeping the wound from drying out and cracking.
Cover the blister with a sterile adhesive bandage or gauze pad. If the blister is in a spot that gets a lot of friction, like your heel or the ball of your foot, a hydrocolloid bandage is worth the upgrade. These dressings have an inner layer that absorbs fluid and forms a gel over the wound, creating a moist healing environment. The outer layer seals out bacteria and debris. They’re designed to stay on for up to a week, and changing the dressing less frequently is actually better for healing because it avoids disrupting the new tissue forming underneath.
If you’re using a regular bandage, change it at least once a day or whenever it gets wet or dirty. Reapply ointment each time you change the bandage.
What Healing Looks Like
Your body starts growing new skin underneath the blister almost immediately. Over the first few days, you’ll notice the area looks pink and tender. Any remaining blister fluid gets slowly reabsorbed, and the old skin on top dries out and eventually peels away on its own. Most uncomplicated blisters heal naturally within 3 to 7 days, though a larger or deeper blister, especially one on a weight-bearing area like your foot, can take closer to two weeks.
During this time, try to minimize pressure and friction on the area. If it’s on your foot, wear shoes that don’t rub the spot, or use padding around (not directly on) the blister. Keeping the wound consistently moist with ointment speeds up healing compared to letting it dry out and scab over.
How to Spot an Infection
Check the blister every day when you change the bandage. Normal healing involves mild redness and tenderness that gradually improves. Infection looks different, and it tends to get worse rather than better over time.
Signs that a popped blister has become infected include:
- Pus that’s green or yellow rather than clear fluid
- Increasing warmth around the blister, noticeably hotter than surrounding skin
- Spreading redness that extends beyond the blister’s edges (on darker skin tones, this may be harder to see visually, so pay attention to warmth and swelling instead)
- Worsening pain after the first day or two rather than improving
- Red streaks radiating outward from the wound
Red streaks or a rapidly spreading rash are more serious signs. An untreated skin infection can develop into cellulitis, a deeper infection that spreads through the tissue. If you notice a swollen, rapidly changing rash along with a fever, that warrants emergency care. A growing rash without fever should still be seen by a healthcare provider within 24 hours.
Special Concerns for People With Diabetes
If you have diabetes, a popped blister on your foot needs more careful attention. Reduced sensation in the feet (a common complication of diabetes) means you may not feel the pain that would normally alert you to worsening damage. A small blister that goes unnoticed or untreated can progress to a diabetic foot ulcer, which is significantly harder to heal and carries a risk of serious complications.
Rather than managing a foot blister on your own, contact your healthcare provider about any sore, crack, or open blister on your feet. This applies even if it looks minor. The threshold for getting professional help is much lower when diabetes is involved.
Preventing Reinjury While It Heals
The most common reason a popped blister takes longer than expected to heal is repeated friction in the same spot. If the blister came from shoes, switch to a different pair until it’s fully healed. Moleskin or donut-shaped padding placed around the blister can offload pressure without sticking to the wound itself.
For blisters on your hands from tools, yard work, or sports equipment, wear gloves during activities until the new skin has fully formed and isn’t tender to the touch. New skin is thinner and more fragile than the surrounding area for several weeks, so it’s prone to blistering again if you jump back into the same activity too quickly.