For a burn that has blistered, apply a thin layer of petroleum jelly or aloe vera and cover it with a nonstick sterile bandage. Before you put anything on the burn, though, you need to cool it properly: hold it under cool running water for at least 20 minutes. That cooling step matters more than whatever you apply afterward, because it stops heat from continuing to damage deeper layers of skin.
Cool the Burn First
A blister means the burn has reached the second layer of skin, and residual heat trapped in the tissue keeps causing damage even after you pull away from the heat source. Running cool (not ice-cold) water over the area for a full 20 minutes draws that heat out. Most people stop too early because the pain eases after a few minutes, but the tissue underneath is still cooking. Set a timer.
Don’t use ice, ice water, or frozen packs. These are too harsh for already-damaged skin and can cause frostbite-like injury on top of the burn. Cool tap water is all you need.
What to Apply to the Burn
Once the burn is cooled, pat the area dry gently and apply a thin layer of petroleum jelly (like Vaseline) or plain aloe vera gel. The ointment doesn’t need antibiotics in it. Antibiotic ointments can actually trigger allergic reactions on burned skin, and a simple moisture barrier like petroleum jelly works just as well at protecting the wound and keeping it from drying out. Apply it two to three times a day.
Do not use butter, cooking oil, toothpaste, egg whites, lotion, or cortisone cream. Greasy substances like butter trap heat in the skin, which slows cooling and worsens the damage. Toothpaste and other home remedies introduce bacteria and chemicals that irritate raw tissue.
How to Bandage a Burn Blister
Cover the burn with a nonstick sterile bandage or a fine mesh gauze paired with a thin layer of petroleum jelly underneath. The key word is “nonstick.” Regular dry gauze sticks to the wound bed as it heals, and pulling it off tears new skin, causes significant pain, and promotes scabbing. If all you have is plain gauze, coat the burn generously with petroleum jelly first to create a barrier.
Change the bandage once a day or whenever it gets wet or dirty. Each time you change it, gently clean the area with cool water, reapply petroleum jelly, and cover with a fresh bandage.
Leave the Blister Intact
Don’t pop, peel, or drain a burn blister. The fluid inside is your body’s own protective cushion. It shields the raw skin underneath from bacteria and physical contact while new skin cells grow. Popping the blister removes that barrier and significantly raises the risk of infection.
If the blister breaks on its own, leave the loose skin in place as much as possible. It still acts as a partial cover. Clean the area gently, apply petroleum jelly, and bandage it as usual.
Managing Pain
Over-the-counter pain relievers like ibuprofen, naproxen, or acetaminophen all work for burn pain. Ibuprofen and naproxen also reduce inflammation, which can help with swelling around the blister. Take them as directed on the package. Keeping the burn covered and moist with petroleum jelly also reduces pain, because exposing raw or blistered skin to air triggers nerve endings.
Signs of Infection
A healing burn blister will be tender and pink, but infection looks different. Watch for thick or milky drainage that’s white, yellow, green, or brown. Infected burns typically smell foul, and that smell gets worse as the infection progresses. Increasing redness that spreads outward from the burn, growing warmth around the wound, or worsening pain after the first few days are all signals that bacteria have taken hold. If drainage changes color or texture, or you develop a fever, the wound needs medical attention.
Burns That Need Professional Care
Not every blistered burn can be managed at home. Any burn on the face, hands, feet, genitals, or over a major joint (elbow, knee, shoulder) should be evaluated by a healthcare provider, regardless of size. These areas have thinner skin, more movement, and higher risk of scarring or functional problems.
Size matters too. For adults, a blistered burn larger than about 3 inches across is worth getting checked. For children under 10 and adults over 50, the threshold is lower because their skin heals differently. Burns that wrap all the way around a finger, toe, or limb also need professional evaluation because swelling can cut off circulation.
Electrical burns, chemical burns, and any burn where the skin looks white, waxy, or charred have damaged tissue deeper than the blister suggests. These always require medical care, even if the surface area looks small.