Black pen bleeding first to disinfect the wound, generally available clean disposable cotton swabs dipped in hydrogen peroxide, alcohol or iodine volts, gently applied to the affected area and the skin around the affected area to achieve the effect of sterilization and antibacterial, and then paste the antibacterial band-aid. If the wound is small and there is no sign of bleeding, you can choose to expose the wound after disinfection without adding a Band-Aid to ensure that the wound is dry and clean to prevent bacteria from multiplying, and if necessary, you can apply medicated ointment to the wound and then wrap it with a Band-Aid; if the wound still bleeds seriously after treatment, you need to wrap it with gauze instead of a Band-Aid and go to the hospital if you cannot stop the bleeding. Patients need to pay attention to if the wound is small and very deep, it is likely to cause infection, if accompanied by vomiting, dizziness symptoms, patients better go to the hospital early after treatment, if necessary, you can inject tetanus antitoxin to avoid future problems, if the wound is shallow can not worry too much.