Psoriasis is a long lasting autoimmune sickness characterized with patches of abnormal epidermis. These skin patches are customarily pink, itchy, and scaly. Psoriasis varies in severity from small, localized patches. Harm to the skin can trigger psoriatic dermis alterations at that spot, which is known as the Koebner phenomenon. There are five foremost types of psoriasis: plaque, guttate, inverse, pustular, and erythrodermic. Plaque psoriasis, also known as psoriasis vulgaris, makes up about ninety percentage of instances. Common symptoms are pink patches with white scales on top. Areas of the body mostly affected are the back of the forearms, shins, navel subject, and scalp. Guttate psoriasis has drop-formed lesions. Pustular psoriasis presents as small non-infectious pus-filled blisters. Inverse psoriasis forms pink patches in dermis folds. Erythrodermic psoriasis occurs when the rash turns into very widespread, and may develop from any of the other varieties. Fingernails and toenails are affected in maximum people when effected with psoriasis.