Psoriasis is a complex polygenic disease with a high disease rate, easy recurrence and a long disease course. The cause of this disease is unknown, and it can only have a recent effect and cannot prevent recurrence. In addition to skin damage, psoriasis, especially psoriasis vulgaris, generally has no visceral organic lesions. Therefore, when choosing a treatment method, it is advisable to be gentle, not intense; it is advisable to be progressive, not eager for success. To prevent the recurrence of psoriasis, the following points should be noted: 1, maintain an optimistic mood: establish confidence in overcoming the disease and maintain a calm and peaceful state of mind is a good medicine to prevent the recurrence of psoriasis. 2.Appropriate rest and exercise: exercise your physique and strengthen your resistance, such as tai chi exercise and qigong therapy, etc. 3, to develop good eating habits: do not drink alcohol, do not smoke, do not eat spicy and stimulating food and fishy products such as mutton and seafood. 4.Water bath: it is an important auxiliary means to treat psoriasis, remove scales and increase skin hydration to improve the therapeutic effect. 5.Prevent colds and remove lesions: actively treat infected wounds and inflammation, especially septic enlargement of tonsils. Removing the tonsils that are often inflamed can facilitate the treatment and prevention of psoriasis. 6.Often take folic acid internally: vitamin A, vitamin C, vitamin B12 and other drugs. 7.Every before the good season, take appropriate cooling blood, eliminating spots and moisturizing herbs: it may avoid or reduce the recurrence of psoriasis. 8.Patients with onset of psoriasis in cold season: sunbathing should be carried out frequently. 9.Avoid trauma: psoriasis is prone to homoeopathic reactions during the progressive stage, extra attention should be paid to protecting the skin and avoiding mechanical and physical injuries (trauma, surgery, friction, mosquito bites, needles, frostbite and burns, etc.). It is also inappropriate to use strongly stimulating drugs.