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Psoriasis is an autoimmune disease that can appear all over the skin. It is commonly seen as red and white hues of scaly patches appearing on the top first layer of the epidermis (skin). There are different types of psoriasis, but it often starts with small red blotches which later become covered with scales. Because of the high salt content and the many hours of sun, the Red Sea is a popular destination for sufferers to seek relief.