DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Allergic reaction to deodorant. A red rash in the armpit of a 65-year-old woman caused by allergy to a deodorant. This reaction, called contact dermatitis, occurs when the body's immune system reacts to a foreign substance as though it were a disease-causing organism. The skin becomes painfully inflamed and red. The most effective treatment is to avoid contact with the substance responsible. Severe inflammation can be reduced with corticosteroid drugs.
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