Psoriasis is a disease in which red, scaly patches form on the skin, typically on the elbows, knees, or scalp. An estimated 7.5 million people in the United States will develop the disease, most of them between the ages of 15 and 30.
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13 Reasons You Have Scaly Skin—and How to Get Rid of It
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What to Do About Plaque Psoriasis on Your Scalp: Dermatologist-Recommended Treatments
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The 3 Best Plaque Psoriasis Treatments, According to Dermatologists