Bullous pemphigoid, arm, blistered rash
Bullous pemphigoid on arm

What is bullous pemphigoid?

Bullous pemphigoid is a rare skin condition that typically affects people in middle age and beyond. It causes a range of skin findings, from itchy, hive-like welts to large, fluid-filled blisters which can get infected.

Bullous pemphigoid may affect a small area of the body or be widespread. The blisters usually occur on areas of the skin that are flexible, such as under the armpit or on the abdomen. About one-third of people with bullous pemphigoid develop blisters in their mouth, throat, and esophagus, in addition to their skin.

Symptoms of bullous pemphigoid come and go. In most patients, the condition goes away within 5 years.

Who gets bullous pemphigoid?

Bullous pemphigoid occurs most often in people over age 60, but it can appear in younger individuals as well. It is seen more in the Western world; it is not common in the Far East. Both men and women are affected equally by bullous pemphigoid.

What causes bullous pemphigoid?

Bullous pemphigoid is an autoimmune disorder. That means it occurs when the body’s own immune system attacks the layer of tissue below the top layer of skin. The reasons for this attack are not known, but bullous pemphigoid can sometimes be triggered by certain medications, including penicillamine.

What are the symptoms of bullous pemphigoid?

Bullous pemphigoid can present with itching, hive-like welts, and multiple blisters, called bullae. These are most commonly seen on the:

  • Arms.
  • Legs.
  • Abdomen.
  • Groin.
  • Mouth.

The blisters may break open and become an open sore or ulcer. The fluid inside the may be clear, or contain some blood. The skin around the blisters can appear either normal or red. The blisters are usually located along creases in the skin.

You should seek medical attention from your healthcare provider if you think you might have bullous pemphigoid.

Last reviewed by a Cleveland Clinic medical professional on 10/10/2019.


  • Kirtschig G, Middleton P, Bennett C, Murrell DF, Wojnarowska F, Khumalo NP. Interventions for bullous pemphigoid. Cochrane Database of Systematic Reviews 2010, Issue 10.
  • Joly P, Benichou J, Lok C, Hellot MF, Saiag P, Tancrede-Bohin E, Sassolas B, Labeille B, Doutre MS, Gorin I, Pauwels C, Chosidow O, Caux F, Estève E, Dutronc Y, Sigal M, Prost C, Maillard H, Guillaume JC, Roujeau JC. Prediction of survival for patients with bullous pemphigoid: a prospective study. Arch Dermatol. 2005 Jun;141(6):691-8.
  • American Osteopathic College of Dermatology. Bullous pemphigoid. Accessed 11/27/2019.

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