You think your blister is from a contagious disease, such as chickenpox, because the virus can be spread to another person.
If a blister has torn open, or after you have drained a blister:
Wash the area with soap and water. Do not use alcohol, iodine, or any other cleanser.
Don't remove the flap of skin over a blister unless it's very dirty or torn or there is pus under it. Gently smooth the flap over the tender skin.
Apply an antibiotic ointment and a clean bandage. If the skin under the bandage begins to itch or a rash develops, stop using the ointment. The ointment may be causing a skin reaction.
Change the bandage once a day or anytime it gets wet or dirty. Remove it at night to let the area dry.
Watch for a skin infection while your blister is healing. Signs of infection include:
Increased pain, swelling, redness, or warmth around the blister.
Red streaks extending away from the blister.
Drainage of pus from the blister.
Home remedies may relieve itching from blisters. One way to help decrease itching is to keep the itchy area cool and wet. Apply a cloth that has been soaked in ice water, or get in a cool tub or shower.
Medicine you can buy without a prescription
Try a nonprescription medicine to help treat your fever or pain:
Aspirin (also a nonsteroidal anti-inflammatory drug), such as Bayer or Bufferin
Talk to your child's doctor before switching back and forth between doses of acetaminophen and ibuprofen. When you switch between two medicines, there is a chance your child will get too much medicine.
Be sure to follow these safety tips when you use a nonprescription medicine:
Carefully read and follow all directions on the medicine bottle and box.