Psoriasis, commonly known as psoriasis, is a non-contagious disease, but there is a certain probability of genetic inheritance. The main causes of psoriasis are related to reduced immunity, family genetic allergies, or repeated inflammation of the tonsils. The causes are quite complex, and once the disease occurs, it cannot be completely eradicated and may be carried for life with long-term recurrent attacks. After the onset of this disease, it is essential to seek standard treatment at the dermatology department of a formal hospital. Generally, through oral and topical medications, combined with narrow-band ultraviolet phototherapy, clinical cure can generally be achieved. If the symptoms are severe, treatment with biologics can be combined. Normally, it is important to regulate one's diet and lifestyle habits, avoid spicy and stimulating foods, try not to eat raw and cold items, and prevent tonsillitis.