For psoriasis, although humans do not fully understand psoriasis, medicine has made great progress in understanding psoriasis, and the following points are essential for us to understand: 1. The disease is currently considered to be a polygenic genetic, immune skin disease associated with infection, emotions, allergies and other factors. 2. The disease is not contagious. 3. There are many ways to treat psoriasis, but no single method is effective for all patients. 4. Proper treatment of psoriasis can lead to clinical cure, and some patients may relapse. 5. There is no special prevention method or treatment method that can “cure” this disease. 6. It is better not to treat than to treat indiscriminately. 7. The disease generally has no visceral damage and has a good prognosis.