The necrotic tissue of the finger hardens and crusts over, requiring observation, medication, and surgery depending on the extent of the injury. If necessary, skin grafting should be done. 1. If the scope of finger necrotic tissue hardening and crusting is small, without damaging the subcutaneous tissue, without infection tendency, and with little influence on the hand joint activities, it can be observed, and the crusted tissue can be dislocated on its own, with iodine povidic disinfection at regular intervals during the period. If the damage is deep and not infected, it is feasible to clean and close the wound. 2. If the necrotic tissue has a large extent of crusting, and the subcutaneous tissue has not been damaged, surgery can be performed to remove the crusting and necrotic tissue, and the wound should be changed regularly after surgery, and antibiotics (e.g., cefaclor) should be taken on a regular basis to prevent infection. If the necrotic tissue involves tendons, etc., without infection, free the flap after debridement. For contamination, anti-infection treatment is needed after debridement, and flap molding is performed after infection control. 3. If the dermis is damaged, after debridement, the trauma is formed and further treatment is carried out through dressing exchange or skin grafting. Finger necrotic tissue hardened and crusted recommended to actively seek medical attention, physician guidance under the treatment.