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Introduction
Bullous pemphigoid is an acute or chronic autoimmune skin disease, involving the formation of blisters, more appropriately known as bullae, at the space between the skin layers epidermis and dermis. It is classified as a type II hypersensitivity reaction, with the formation of anti-hemidesmosome antibodies.
Causes
In most cases of bullous pemphigoid, no clear precipitating factors are identified. Potential precipitating events that have been reported include exposure to ultraviolet light and radiation therapy. Onset of bullous pemphigoid has also been associated with certain drugs, including furosemide, and other nonsteroidal anti-inflammatory agents, captopril,penicillamine, and antibiotics.
Symptom
The most common symptom of pemphigoid is blistering that occurs on the arms, legs, abdomen, and mucous membranes. Hives and itching are also common. The blisters have certain characteristics, regardless of where on the body they form: they are often preceded by a red rash, they are large and filled with fluid that is usually clear, but may contain some blood they are thick and do not rupture easily, the skin around the blisters may appear normal or slightly red or dark, ruptured blisters are usually sensitive and painful.
Treatment
Pemphigoid cannot be cured, but treatments are usually very successful at relieving symptoms. Corticosteroids, either in pill or topical form, will likely be the first treatment your doctor prescribes. These medications reduce inflammation and can help to heal the blisters and relieve itching. However, they can also cause serious side effects, especially from long-term use, so your doctor will take you off of the corticosteroids after the blistering clears up. Another treatment option is to take medication that suppresses your immune system, often in conjunction with the corticosteroids. Immunosuppressants help, but they also put you at risk for other infections. Certain antibiotics, such as tetracycline, may also be prescribed to reduce inflammation and infection.
Statistics
The overall BP incidence was lower among men than among women (17.5 vs. 25.7 cases per million years, respectively, P<0.0001). Among people aged 80 years or above, the incidence of BP in men was slightly higher than that in women (363 vs. 312 cases per million years), albeit not significantly (P=0.19).