Seborrheic dermatitis mainly affects the scalp, but it can also affect oily parts of the body such as the face, eyebrows, sides of the nose, eyelids, ears, and chest. It causes stubborn dandruff, red skin, and scaly patches. Doctors don't know what prompts the condition, but an abnormal immune system response or yeast in the oil secreted on the skin could contribute. Treatment for seborrheic dermatitis typically includes medicated shampoos, lotions, and creams.

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