MIKE DEVLIN / SCIENCE PHOTO LIBRARY MIKE DEVLIN / SCIENCE PHOTO LIBRARY
Eczema on arm. Close-up of eczema in the crook of the elbow. The skin is swollen and red. Eczema is an inflammation of the skin, accompanied by itching, scaling or blisters. Usually the cause is unknown, but occasionally it is an allergic reaction. There are four main types of eczema: atopic, which usually occurs in children; nummular, which normally occurs in adults; stasis eczema which occurs in people with varicose veins; and hand eczema which is an allergic reaction, often to detergents. Eczema in general can be treated by applying a soothing cream to the area, and then dressing the rash to prevent scratching, which can lead to broken skin and infection.
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