Finger (toe) nail dotted depression is a symptom of psoriasis involving the nail, psoriasis in the nail matrix area will appear dotted depressions, crests and grooves of the nail plate, while nail peeling, hyperkeratosis and rupture bleeding under the nail. To prevent the recurrence of psoriasis, the following points should be noted: 1, maintain an optimistic mood. Some people statistics, psoriasis patients more than 75% accompanied by impatience, agitation, irritability of bad mood. Many patients develop or aggravate because of mental stimulation, and some patients heal themselves because of their cheerful mood. Therefore, establishing confidence in overcoming the disease and maintaining a calm and peaceful state of mind is a good remedy to prevent psoriasis from recurring. 2.Appropriate rest and exercise. Exercise your physique and strengthen your resistance, such as tai chi exercise and qigong therapy. 3.Cultivate good eating habits. Do not drink alcohol, do not smoke, do not eat spicy and stimulating food as well as mutton, seafood and other fishy products. 4, remove the lesion. Actively treat infected wounds and inflammation, especially tonsillar abscesses and swelling. Removal of the often inflamed tonsils can facilitate the treatment and prevention of psoriasis. 5.Take folic acid, vitamin A, vitamin C, vitamin B12 and other drugs internally frequently. 6.Every time before the good season, take appropriate herbal medicine for cooling blood and eliminating spots and moisturizing skin, which can effectively avoid or reduce the recurrence of psoriasis. 7.Patients with onset of psoriasis in cold season should often take sunbathing.