A blister is a bump on the skin containing fluid. Blisters are usually round in shape. The fluid that forms underneath the skin can be bloody or clear.
Blisters are caused by injury, allergic reactions, or infections, which may include the following:
Burns and scalds
Friction (such as from a shoe)
Impetigo, a contagious skin infection
Viral infections, including chickenpox and herpes zoster
The symptoms of a blister may resemble other skin conditions or medical problems. Always talk with your child's healthcare provider for a diagnosis.
Blisters often heal on their own. Treatment will vary according to the cause. Some general guidelines for treatment may include:
Wash the area with soap and water.
A cold or ice pack may help reduce swelling and discomfort.
Keep the area clean and dry. Don't burst or puncture the blister.
If the blister bursts, place an adhesive bandage or dressing on the area to keep it clean.
Watch the area for signs of infection. These include increased warmth, swelling, redness, drainage, pus formation, or pain. If you see any signs of infection, call your child's healthcare provider. Antibiotics may be needed.
Blisters that don't heal, or, blisters that keep coming back, should be seen by a healthcare provider.
The University of Chicago Medicine
5841 S. Maryland Avenue
Chicago, IL 60637 | 773-702-1000
Appointments: Call UCM Connect at 1-888-824-0200