The best way to take care of a blister is to leave it intact. The unbroken skin over a blister acts as a natural barrier against bacteria, and keeping it sealed significantly lowers your risk of infection. Most friction blisters heal on their own within one to two weeks if you protect them from further irritation.
That said, not every blister is the same. A small blister on your heel needs different handling than a large, painful one on your palm or a blister caused by a burn. Here’s how to manage each situation.
Protecting an Unbroken Blister
If your blister isn’t causing much pain, your only job is to keep it from popping. Cover it with a bandage or, for blisters in high-friction spots like your feet, use moleskin. Cut a piece of moleskin about an inch larger than the blister on all sides, then fold it in half and cut a half-circle the size of the blister from the folded edge. When you unfold it, you’ll have a donut shape that cushions the area around the blister without pressing on it. Place it over the blister so the raised skin sits in the hole, then cover everything with gauze.
Hydrocolloid blister patches are another option worth knowing about. These gel-based adhesive patches heal blisters about 20% faster than ordinary bandages and provide noticeably better pain relief. They’re waterproof and sweat-resistant, which makes them practical if you need to keep moving, exercising, or working. You can find them at most pharmacies, often sold as blister-specific bandages.
When and How to Drain a Blister
If a blister is large, painful, or in a spot where it’s likely to burst on its own, draining it yourself is safer than letting it tear open unpredictably. The goal is to release the fluid while keeping the overlying skin in place, since that flap of skin still protects the raw layer underneath.
Start by washing your hands and the blister thoroughly with soap and water. Swab the blister with an antiseptic. Sterilize a needle with rubbing alcohol, then make a small puncture near the blister’s edge. Gently press the fluid out. Apply antibiotic ointment and cover with a clean bandage. Don’t peel away the loose skin. After several days, once the skin underneath has started to toughen, you can trim the dead skin with scissors and tweezers sterilized with rubbing alcohol or an antiseptic wipe. Reapply ointment and a fresh bandage.
If a Blister Pops on Its Own
Don’t peel off the loose skin. Let the fluid drain naturally, then clean the area gently with water. Apply antibiotic ointment and cover it with a sterile dressing. Change the bandage daily or whenever it gets wet or dirty. The exposed skin underneath is vulnerable to bacteria, so keeping it covered and clean matters more now than it did when the blister was intact.
Burn Blisters Need Different Care
Blisters caused by burns follow different rules. Do not pop them. Run cool (not ice-cold) water over the burn for several minutes first, then cover the area loosely with a sterile bandage. If a burn blister breaks on its own, clean it gently with water and apply an over-the-counter antibiotic ointment.
Some burn blisters need professional treatment. Seek emergency care if the burn goes through all layers of skin, looks dry or leathery, appears charred or has white, brown, or black patches, or is larger than about 3 inches across. Burns on the eyes, mouth, hands, or genitals also warrant medical attention regardless of size. The same goes for burns caused by electricity, lightning, or strong chemicals, or any burn accompanied by rapid swelling or smoke inhalation. If the burn is deep and you haven’t had a tetanus shot in the past five years, you may need a booster.
Blood Blisters
Blood blisters, the dark red or purple ones caused by pinching or crushing rather than friction, typically heal on their own without any treatment. Resist the urge to pop them. The blood inside reabsorbs naturally as the skin repairs itself. One exception: blood blisters that develop inside your mouth, on your cheek, lips, or gums, can sometimes signal a more serious underlying issue and are worth having a healthcare provider look at.
Recognizing an Infected Blister
Most blisters heal without complications, but infection is the main risk, especially if the skin has broken. Watch for these signs: the area around the blister becomes increasingly red and warm, the fluid inside turns green or yellow (instead of clear), pain worsens rather than gradually improving, or red streaks begin extending outward from the blister. On darker skin tones, redness can be harder to spot, so pay close attention to warmth and changes in the fluid’s color. An infected blister needs medical treatment.
People With Diabetes or Poor Circulation
If you have diabetes, peripheral neuropathy, or any condition that affects blood flow to your feet, even a small blister deserves extra caution. Reduced sensation means you might not feel a blister forming or worsening. Slower healing and a higher infection risk make what would be a minor nuisance for most people a potential gateway to serious complications. Keep the blister clean and protected, check it daily for signs of infection, and get professional guidance early rather than waiting to see if it resolves.
Preventing Blisters in the First Place
Friction blisters are almost always preventable. Moisture and repetitive rubbing are the two ingredients, so eliminating either one helps. Wear moisture-wicking socks rather than cotton. Break in new shoes gradually. Apply moleskin, adhesive tape, or a lubricant like petroleum jelly to hot spots before they develop into blisters. For your hands, wear gloves during activities that cause repetitive friction, whether that’s raking, rowing, or using hand tools.
If you notice a “hot spot,” a red, tender area that hasn’t blistered yet, stop and cover it immediately. That five-second intervention can save you a week of managing a blister.