Psoriasis is a non-contagious, lifelong skin disease. According to the National Institutes of Health, as many as 7.5 million Americans have psoriasis. There are five types of psoriasis.#1-Plaque psoriasis - Most common form of the disease#2-Guttate psoriasis - Appears as small red spots on the skin#3-Inverse psoriasis - Occurs in armpits, groin and skin folds#4-Pustular psoriasis - White blisters....