Blisters are raised areas of collected fluid under the top layer of skin.
Blisters are usually circular in shape.
A blister filled with serum actually acts as a protective buffer for the damaged area. The symptoms of a blister may resemble other dermatologic conditions. Consult a physician for diagnosis. This information is not intended to be a substitute for individual medical advice in diagnosing or treating a health problem. Please consult with your health care provider about your health care concerns.