Arthritis psoriasis accounts for about 2% of psoriasis, which is more common in women and often appears after a long period of time in common psoriasis, or can be caused by recurrent worsening of symptoms, in addition to typical psoriasis damage; it can also be accompanied by joint lesions, which can affect both large and small joints, especially small joints of hands and feet, cervical spine, sacroiliac joints, followed by elbow joints, manifesting as joint pain and swelling, and in severe cases, large joint cavities can Joint symptoms change with psoriasis, and when the skin lesions disappear, the joint symptoms may also improve or disappear. When erythrodermic or pustular psoriasis is accompanied by arthritis, the symptoms are often more severe and the joints are often destroyed.