Sunburn and skin blisters

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Sunburn and skin blisters

Signs of infection that may develop in skin blisters are:

• Increased pain, swelling, redness, or warmth around the affected area.
• Red streaks extending from the affected area.
• Pus inside blisters.
• Swollen lymph nodes in the neck, armpit, or groin.
• Fever.

Small, unbroken blisters [less than across] usually heal on their own.

• Do not try to break the blisters. Just leave them alone.
• Do not cover the blisters unless something such as clothing is rubbing against them. If you do cover them, apply a loose bandage. Secure the bandage so the tape does not touch the blisters. Do not wrap tape completely around a hand, arm, foot, or leg, because it could cut off the blood supply if the limb swells. If the tape is too tight, you may develop symptoms below the level of the tape, such as numbness, tingling, pain, or cool and pale or swollen skin.
• Avoid wearing clothes or shoes or doing activities that rub or irritate the blisters until they have healed.

Large or broken blisters usually heal without problems. Most large blisters will break on their own and then heal.

If you have a large blister, you may want to drain it, depending on where it is. If you decide to drain it:

• Wash your hands with soap and water before touching blisters. Blisters can easily become infected.
• If you have a large blister, you may want to drain it.
  • Clean a needle with rubbing alcohol or soap and water, then use it to gently puncture the edge of the blister.
  • Press the fluid in the blister toward the hole you made.
  • Wash the blister after you have drained it, and pat it dry with clean gauze.
• Do not remove the flap of skin covering the blister unless it tears or gets dirty or pus forms under it. If the blister has just a small puncture or break, leave the flap of skin on and gently smooth it flat over the tender skin underneath.
• Apply an antibiotic ointment, such as polymixin B or bacitracin, if you are not allergic to it. The ointment will prevent the bandage from sticking to the blister and may help prevent infection. Do not use alcohol or iodine on the blister, because these may delay healing. Do not use an ointment if you know you are allergic to it.
• Loosely apply a bandage or gauze. Secure the bandage so the tape does not touch the blister. Do not wrap tape completely around a hand, arm, foot, or leg, because it could cut off the blood supply if the limb swells. If the tape is too tight, you may develop numbness, tingling, pain, or cool and pale or swollen skin below the level of the tape.
• If the skin under the bandage begins to itch or develops a rash, stop using the antibiotic ointment.
• Change the bandage every day and anytime it gets wet or dirty. You can soak the bandage in cool water just before removing it to make it less painful to take off.
• Avoid wearing clothes or shoes or doing activities that rub or irritate the blisters until they have healed.

Blisters after a sunburn means the skin has been damaged. Skin blisters can also be signs of second- or third-degree burns. Repeated sunburns and blistering can cause skin changes, such as age spots and wrinkling, and increase your chances of getting skin cancer.

Credits

Last updated:	December 28, 2007
Author:	Jan Nissl, RN, BS
Reviewed By:	William M. Green, MD - Emergency Medicine, Alexander H. Murray, MD, FRCPC - Dermatology
Editors:	Susan Van Houten, RN, BSN, MBA, Tracy Landauer