What is the first aid treatment for a traumatic hand injury? First of all, the most important thing in the early stage is to bandage and stop bleeding correctly: use clean cloth, paper towels, handkerchiefs, etc. to bandage the wound to stop bleeding, or use a tourniquet if available; if the finger has been severed, apply clean cloth to wrap the finger and send it together to a hospital with hand surgery repair conditions for further treatment. But not with handkerchiefs, belts, leather tubes, etc. tied to the top of the wrist, which not only can not stop the bleeding, but also aggravate the bleeding, and in some cases even cause finger necrosis, and secondly, to prevent further contamination: the purpose is to make the wound not to be invaded by external bacteria. The correct method is: use sterilized dressings to dress the wound, but also available clean cotton products, never apply purple potion and other drugs on the wound, which will affect the doctor’s correct judgment of the injury. Third, to prevent injury finger aggravated injury: this refers to when the finger fracture, incomplete severance, if not fixed, let it move freely can make the original undamaged vascular nerve injury. The correct method is to use a small wooden plate, iron, etc. for a temporary fixation, which also has a pain relief effect. The current level of microsurgery and technology is quite mature, now almost any part of the broken finger is possible to revive. In order to avoid crippling the injured finger in the future. First, do not throw away the broken finger; second, properly preserve the broken finger. The correct method is to wrap the broken finger with sterile dressing, then wrap it in a plastic bag outside, and then put some ice cubes or sorbet outside the bag. The broken finger should not be invaded by sprinkling essence, sterilized water, saline, etc., which will destroy the tissue structure of the broken finger and affect the survival rate of replantation.