Hand cut by knife first disinfect the wound, and then bandage to stop bleeding to prevent infection. Hand cut by a knife after the epidermis is damaged, you can disinfect the wound, and then bandage to stop bleeding, while preventing infection, and wait for the wound to gradually recover. After the hand is cut by a knife, the wound is deeper and bleeds more heavily, the treatment measures at the scene is to use relatively clean and sterile gauze or towels, clothing and other bandages to stop bleeding. Then go to the hospital for further examination of the wound to see if there is any damage to blood vessels, nerves or tendons. If the hand is cut by a knife, if it is only a simple skin laceration, you need to promptly clean the wound and suture treatment. If there are nerves, blood vessels and tendons damage, you need to repair the surgery. For deeper wounds, a tetanus shot is usually needed to prevent tetanus infection. It is recommended that after the accident, go to the hospital to complete the examination, after a clear diagnosis to take targeted treatment, do not treat it indiscriminately, so as not to cause adverse consequences.