What Can Cause Blisters on the Skin?

Blisters are small raised areas of fluid under skin that serve as a buffer to protect damaged areas. Blisters are generally circular. They can have many causes, including burns, friction, infection, poison ivy and automimmune disorders.

Burns

• Burned or scalded skin, including sunburned skin, can blister.

Friction

• Friction can also cause blisters. For example, wearing improperly fitting shoes, riding a bike, or using a rake without gloves can cause blisters.

Infections

• Several types of infection can lead to blisters, including impetigo, herpes and chicken pox. Blisters caused by herpes are referred to as cold sores.

Poison Ivy

• Contact with poison ivy, poison oak or other irritants such as detergents, solvents or chemicals may cause blisters. This is referred to as contact dermatitis.

Autoimmune Disorders

• Some autoimmune disorders, including pemphigoid and dermatitis herpetiformis, can cause blisters.

Treatment

• Keep blisters dry and clean, and put clean dressings on blisters that have burst. Blisters usually heal on their own, but your doctor may prescribe antibiotics if you have a bacterial infection.