In this section
What is a blister?
A blister is a bump on the skin containing fluid. Blisters are usually circular in shape. The fluid that forms underneath the skin can be bloody or clear.
What causes a blister?
Blisters are caused by injury, allergic reactions, or infections, which may include the following:
- Friction (from a shoe, for example)
- Contact dermatitis
- Impetigo (a contagious infection of the skin)
- Viral infections (including chickenpox and herpes zoster)
The symptoms of a blister may resemble other skin conditions or medical problems. Always consult your child's physician for a diagnosis.
First-aid for blisters:
Blisters often heal spontaneously. 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 - do not burst or puncture the blister
- If the blister bursts, place an adhesive bandage or dressing on the area to keep it clean
- Observe the area for signs of infection such as increased warmth, swelling, redness, drainage, pus formation, or pain. If you notice any signs of infection, call your child's physician--antibiotics may be needed.