Psoriasis is a chronic (long-life) Auto Immune Diseases. It causes skin cells grow rapidly on the surface of the skin due to fault signals from the immune system. The new skin cells form in days rather than a week. The body does not shed these entire skin cells so that the excess skin cells will form scales and red patches. There are five main types of psoriasis: plaque, guttate, inverse, pustular, and erythrodermic. It won’t spread by touching another person who has it. To get psoriasis, a person’s genes must get inherited. There is no complete cure for psoriasis, but some treatments will help to control the symptoms like Steroid and Vitamin D3 cream, methotrexate (Immune Suppressing Medications).