Patients with black spots under the nails, according to the different causes of black spots, different treatment methods can be taken clinically, as follows: I. Strengthen the intake of vitamins: if the patients due to a long time lack of more vitamins, such as vegetables and other foods, which caused the local nail changes, the deposition of spots, you can strengthen the intake of vitamin-rich foods through appropriate to enhance the body’s Resistance, strengthen immunity, so as to improve the performance of local nails under the black spot. Second, hot compress: if the black spots under the nails are caused by localized bruises and the degree of bruises is light, appropriate hot compress can be applied to promote the gradual absorption of bruises. If the local bruise range is large, and for a long time, if necessary, you can pull out the nail to completely clear the wound, so as to avoid the local bruise progressive aggravation, and cause local infection, resulting in the destruction of the nail bed. Most patients can achieve better results through active treatment.