Most blisters heal on their own if you protect them and keep them clean. The best treatment depends on whether the blister is intact or already torn, what caused it, and how much pain it’s causing. In most cases, you can handle a blister at home with supplies you already have.
Leave It Intact When You Can
An unbroken blister is its own best bandage. The fluid inside cushions the damaged skin underneath, and the roof of the blister acts as a natural barrier against bacteria. If a blister isn’t causing significant pain, your goal is simply to keep it from popping. Cover it with a loose bandage or padding to reduce friction, and avoid putting pressure on the area.
Small blisters from a new pair of shoes or a day of yard work will typically reabsorb their fluid within a few days. The skin underneath regenerates, the outer layer dries out and peels away, and you’re left with fresh skin. No ointment or special treatment needed.
How to Drain a Painful Blister Safely
If a blister is large, in a weight-bearing spot, or painful enough that it’s interfering with your day, you can drain the fluid yourself. The key rule: leave the overlying skin in place. That dead skin still protects the raw layer underneath.
Here’s the process:
- Wash your hands and the blister thoroughly with soap and water.
- Swab the blister with rubbing alcohol or another antiseptic.
- Sterilize a sharp needle with rubbing alcohol or an antiseptic wipe.
- Prick the blister in several spots near the edge, not the center.
- Gently press the fluid out, keeping the skin flap intact.
- Apply petroleum jelly and cover with a nonstick bandage or gauze pad.
You may need to repeat the drainage if the blister refills over the next day or two. Each time, clean the area and re-cover it.
Petroleum Jelly vs. Antibiotic Ointment
You might reach for a triple antibiotic ointment out of habit, but plain petroleum jelly works just as well for an open blister. Antibiotic ointments have not been shown to offer healing advantages over petroleum jelly, and the antibiotics they contain (like neomycin and bacitracin) are common causes of contact dermatitis. That means they can actually irritate the wound and slow healing. Petroleum jelly keeps the area moist, which is what matters most, without the risk of an allergic skin reaction.
Why Hydrocolloid Bandages Work Well
If you’ve seen the thick, gel-like blister bandages sold at pharmacies, those are hydrocolloid dressings. They’re a step up from a standard adhesive bandage for a few reasons.
Hydrocolloid dressings seal the blister from bacteria and create a moist environment underneath. That moisture speeds up healing by encouraging new skin cells to grow and helping the body clear away damaged tissue naturally. They’re less bulky than gauze and tape, stay in place longer, and don’t stick to the wound the way traditional bandages can. When you peel off a regular bandage, it can tear away newly forming skin. Hydrocolloid dressings release cleanly.
They also need changing less often. Where a gauze pad might need replacing once or twice a day, a hydrocolloid patch can stay on for several days unless it starts peeling at the edges or gets visibly dirty. For blisters on your feet, they’re thin enough to wear comfortably inside shoes.
Treating Burn Blisters Differently
Blisters from burns require a different first step. Before you do anything with the blister itself, cool the burn by running cool (not cold) water over it for about 10 minutes. Cold water or ice can worsen the injury by constricting blood flow to already damaged tissue.
Do not pop a burn blister. The intact skin is critical for preventing infection in burned tissue, which is especially vulnerable. If the blister breaks on its own, clean it gently with water and apply a thin layer of petroleum jelly, then cover it. Skip the home remedies you may have heard about: butter, toothpaste, and cooking oil all trap heat in the skin and can cause further irritation.
Blood Blisters
Blood blisters look alarming because of the dark red or purple fluid inside, but they form the same way as clear blisters, just with damage to tiny blood vessels beneath the skin. They heal on their own without drainage. In fact, you should never pop a blood blister. The pooled blood creates a higher infection risk if exposed, and the skin covering it is doing important protective work.
If a blood blister is on your foot, wear open-toed shoes or go without shoes when possible to keep pressure off it. An over-the-counter pain reliever can help if it’s sore. Clean the area, apply an antibacterial cream, and keep it covered with a bandage while it heals. Most blood blisters resolve within one to two weeks.
Signs of an Infected Blister
Most blisters heal without complications, but infection is the main risk to watch for. The warning signs are distinct:
- The fluid inside turns green or yellow (rather than clear or slightly blood-tinged).
- The skin around the blister becomes red, warm, or swollen. On darker skin tones, redness may be harder to spot, so pay attention to warmth and swelling.
- The area becomes increasingly painful rather than improving over a couple of days.
- Red streaks extend outward from the blister.
An infected blister needs professional treatment. The infection can spread deeper into the skin or into the bloodstream if left alone.
Blisters and Diabetes
If you have diabetes, any blister on your feet deserves extra caution. Reduced blood flow and nerve damage in the feet, both common with diabetes, mean blisters heal more slowly and infections develop more easily. You may not even feel a blister forming because of diminished sensation. The CDC lists blisters, ulcers, and infected sores on the feet as reasons for people with diabetes to see their doctor. A small blister that would be routine for someone else can become a serious wound when circulation and nerve function are compromised.
Preventing Blisters in the First Place
Friction blisters are easier to prevent than treat, especially if you know your trouble spots. One surprisingly effective option is plain paper medical tape. A study of ultramarathon runners found that taping blister-prone areas with paper tape significantly reduced blister formation. The tape is cheap, easy to apply (just wrap a narrow strip over the area), and unlike adhesive bandages, it won’t rip away skin when removed.
Some popular prevention methods actually backfire. Petroleum jelly applied to the feet increases friction rather than reducing it, and standard bandages and moleskin patches have also been shown to raise blister rates in studies. Moisture-wicking socks help more than cotton, which holds sweat against the skin. For new shoes, break them in gradually rather than wearing them for a full day right away.
If you’re heading out for a long hike or run, apply tape to the spots where you’ve blistered before: the back of the heel, the ball of the foot, and the sides of the toes are the most common locations. Prevention takes 30 seconds and saves days of limping.