How is skin blisters treated?

A small, intact blister often needs gentle cleansing, a soft dressing, and protection from rubbing. Do not deliberately puncture it: the roof helps shield the raw skin underneath. A clinician may drain a large or painful blister using sterile technique, particularly when movement is restricted.

Treatment changes with the trigger. Sunburn can need cooling and careful hydration of the skin; contact dermatitis may improve after avoiding the irritant. Recurrent tiny blisters on the hands or feet can occur with dyshidrotic eczema. Grouped blisters may occur with cold sores or chickenpox, while widespread tense blisters need assessment for bullous pemphigoid.

Wash your hands before touching the area. Clean gently with lukewarm water, pat dry, and cover with a non-stick dressing. Keep footwear or clothing from pressing on it, and replace a wet or dirty dressing. If it opens, let the fluid drain, leave the covering skin in place, and cover the wound again. Avoid sharing towels when an infection such as cold sores or chickenpox is possible.

Arrange prompt medical care for spreading redness, warmth, pus, worsening pain, fever, or red streaks. Seek urgent help for blisters after a serious burn, blisters affecting the eyes or mouth, rapidly spreading blisters, or skin peeling over a large area. A clinician should also assess repeated or unexplained blisters.

Ask what may have triggered the blister, whether it should be drained, how to dress it, and which symptoms would suggest infection. If a medicine or recurring rash may be involved, ask whether testing or a change in treatment is appropriate.