Psoriasis, commonly known as psoriasis, is associated with reduced immunity, genetic factors, or recurrent tonsil inflammation. Once this disease occurs, it cannot be completely eradicated and will be carried for life, varying only in severity of symptoms. Once the disease appears, proper medical treatment is essential. If the symptoms are mild, conventional oral and topical medications can quickly lead to complete recovery of the skin lesions. If the symptoms are severe, long-term medication combined with narrowband ultraviolet phototherapy is needed. The specific recovery time for the skin lesions is uncertain; it could be very short or may not subside for a long time, requiring ongoing treatment. For severe cases, treatment with biological injections can also be combined, which currently shows good effectiveness.