Due to the seriousness of the injury of electrical burns can often reach the blood vessels, nerves, muscles, bones, and the wound at the muscle is mostly sandwich necrosis, the tissue will also appear secondary necrosis, hemorrhage, amputation rate is quite high. Your colleague was seriously injured, the hand has appeared blood supply obstacles, and electrical burns in the deep tissues will appear progressive edema, both of which will make the hand further necrosis. If the finger is not completely black and there is still a chance of survival, then the treating physician can first perform an incision and decompression surgery, and then ask the specialist for further treatment.