Psoriasis, also known as psoriasis, starts out as red papules or plaques and comes in a variety of forms, but symptoms may not be quite the same for each patient. The cause of psoriasis is unknown and may be related to the body’s immune function. It may grow all over the body, such as on the face, scalp, armpits, breasts and groin. In the early stages of the disease, patients may have papules or plaques on the skin that are red in color. And the morphology is more varied, such rashes may form map-like, dot-drop-like, plaque-like, etc.. The surface of the red rash will be covered with white scales. It may be accompanied by itching, but usually there is no pain or other symptoms. Once you notice such phenomenon on your skin, you need to be alerted to the presence of psoriasis and should seek medical examination promptly.