formerly University of Missouri-Rolla
Blister

 

A blister or bulla is a fluid filled lesion on the top layer of skin (epidermis) which can occur as a result of several causes:

  • Contact dermatitis such as Poison Ivy or oak
  • Viral illness, such as chicken pox , shingles, or fever blisters (herpes)
  • 2nd degree burns, possibly from sunburn
  • constant pressure from objects such as shoes or from gripping tools

The skin is nature's barrier against infection; as long as it is intact, the barrier is effective. Once the blister is open it becomes a port of entry for bacteria, possibly causing infection.

Treatment of Blisters

  • Wash well and gently with soap and water to remove bacteria from skin.
  • If blister is open,oozing or draining clear fluid:
    • A dressing may be applied for comfort.
    • Antibiotic ointment may be applied to prevent the open tissue from sticking to the dressing and to help prevent infection.
  • If blister is intact:
    • It is generally not advisable to puncture or break the blister.
    • If it is very large it may be opened under sterile technique for comfort purposes.
    • Once opened, most blisters require a dressing and must be monitored for signs of infection .

*If a blister becomes infected or fails to heal....See a Doctor.*