A person affected might first mistake it for fungal infection, a disease that also causes white patches to appear on the skin. A big difference between the two is the inflammation of the affected area and the silvery white scale that covers it. These patches are called "lesions." The coverage area of these lesions can range from minimal to widespread depending on the person affected. For most people, though, psoriasis tends to be mild. Unlike fungal infection also, psoriasis is not contagious. Contrary misconceptions, it cannot be passed on to another person by skin contact. Psoriasis can develop on any part
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