Daily Health Tips

Diagnosis

If it is not clear the cause of your blisters, your doctor will ask about family history and medical history, including any allergies you have had and any medications you take, including prescription medications. The doctor will also ask about recent exposure to irritating chemicals or allergens.

Your doctor can often diagnose the cause of your blisters as these have the appearance and medical history. If your doctor suspects an allergic reaction may recommend patch tests with chemicals to identify the allergen.

Some diseases are diagnosed with bullous skin biopsy, which is removed through a small piece of tissue and examined in the laboratory.

Duration

The duration of the blisters depends on the cause. For example, blisters caused by irritation generally go away by themselves within a few days, and those triggered by infections and skin diseases can remain for weeks or months. In autoimmune bullous disease, the blisters can be chronic and require ongoing treatment.

In skin infections, including infection by herpes simplex virus, blisters can return periodically. Blistering diseases of the skin due to hereditary causes are also chronic conditions.

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