If the trauma injures the dermatomal nerve, there is no need to worry too much. Generally, the dermatomal nerve can gradually grow back with time, however, the patient will have mild local numbness and itching sensation. If the injured nerve is the main nerve, such as flexor nerve, ulnar nerve, etc., you need to go to the hospital for treatment in time. The doctor will perform nerve anastomosis under anesthesia and in a microscope, and then later regular drug changes and possibly infusion therapy will be required. And after the nerve injury, the diet also needs to be paid attention to, for example, not to eat too spicy food, such as chili, spicy strips, spicy hot pot, etc., not to drink alcoholic beverages, not to eat indigestible food, such as dried vegetables, dried mushrooms, dried bean curd, etc. You can consume more vitamin-rich and fiber-rich foods such as fruits and green vegetables. Properly consume more B vitamin-rich, and C vitamin-rich fruits, such as apples, kiwi, duck pears, etc., which help nerve growth. You can also properly consume more high-quality protein, such as fish, shrimp, etc.