Dermatitis is inflammation of the skin, which may be acute or chronic. A chronic allergic form of this disorder that appears early in childhood is called eczema or atopic dermatitis. Although its exact cause is unknown, atopic dermatitis is made worse by allergies, infection, temperature extremes, and skin irritants.

Other forms of dermatitis include contact dermatitis, caused by chemical irritants; seborrheic dermatitis, which involves areas with large numbers of sebaceous glands such as the scalp and face; and stasis dermatitis, caused by poor circulation.

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