Psoriasis is an immune condition, which causes symptoms on the skin and sometimes the joints. When a person has psoriasis, their skin replacement process speeds up, taking just a few days to replace skin cells that usually take 21-28 days. This abundance of skin cells builds up to form raised ‘plaques’ on the skin, which can also be flaky, scaly, red on caucasian skin, darker patches on darker skin tones, and itchy. Psoriasis can occur on any area of the body, including the scalp, hands, feet and genitals, although different types tend to occur on different areas.Psoriasis an insusceptible interceded illness that influences the skin. It is commonly a long lasting condition. The name psoriasis is from the Greek dialect, significance harshly "tingling condition" (psora "tingle" + -sis "activity, condition"). There is as of now no cure, however different medications can serve to control the manifestations. Psoriasis happens when the resistant framework mix ups an ordinary skin unit for a pathogen, and conveys broken indicators that reason overproduction of new skin cells. It is not infectious. Psoriasis has been joined to an expanded danger of stroke and treating high blood lipid levels might accelerate change. There are five sorts of psoriasis: plaque, guttate, opposite, pustular, and erythrodermic. The most well-known structure, plaque psoriasis, is ordinarily seen as red and white shades of layered fixes showing up on the top first layer of the epidermis (skin). A few patients, however, have no dermatological signs or manifestations. In plaque psoriasis, skin quickly amasses at these locales, which gives it a shimmering white presence.