Psoriasis is a skin condition which results in redness of skin and also causes irritation. People who are diagnosed with Psoriasis usually have silver flaky white patches known as scales and thick red skin. It happens when faulty signals are sent out by the immune system of the body which results in rapid growth of skin cells. Psoriasis is non-contagious. The disease is classified in five different types: guttate, pustular, erythrodermic, inverse and plaque.