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What skin disorder is causing a white scaly rash on my elbows or knees?

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
A white, scaly rash on the knees and elbows is likely psoriasis. You may remember an old TV commercial that described "the heartbreak of psoriasis." Comedians joked about it, but psoriasis is no laughing matter. This skin condition (pronounced "so RYE uh sis") may affect other parts of the body besides the elbows and knees, such as the scalp, palms, or soles of the feet. The rash may also cause burning, itching, soreness, and blisters. Psoriasis occurs because the body's immune system develops a glitch. Normally, immune cells attack and destroy germs and other foreign bodies that can harm you. In psoriasis, the immune system mistakenly attacks healthy tissue and produces the symptoms of this skin disorder.

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