The diagnosis of psoriasis can be emotionally devastating for patients who must struggle to cope with this chronic skin disease.  Psoriasis is not contagious so you don't "catch" psoriasis like the flu.  This is due to the fact that psoriasis is an autoimmune disease.  What happens with psoriasis is that the immune system delivers faulty signals to accelerate the growth of skin cells.  This increase in skin cell growth can cause the most common type of psoriasis called "plaque psoriasis." ...