Being poked by the pencil wound black, indicating that the wound epidermis has been broken, within the pencil tip components retained. If the wound is not deep, it can be sterilized with iodophor or hydrogen peroxide; if the wound is deeper, it is recommended to go to the hospital in time for examination and choose debridement, anti-inflammation, prevention and treatment of Clostridium tetani, surgical treatment and so on. 1. For wounds that are not deep, usually the skin will slowly heal after a few days and the color will gradually return to normal, so usually only need to disinfect with iodine vapour and so on. 2. However, if the wound is deep, in order to avoid infection, the wound should be cleaned and treated in a timely manner, remove the dirt and foreign objects, and disinfect the wound with iodophor and other disinfectants, then bandage it and change the dressing regularly. And inject tetanus antitoxin to prevent tetanus. Can take amoxicillin, cefadroxil and other antibiotics anti-infection treatment. 3. In addition, once the local skin redness or swelling occurs, or the wound has pus, we should consider surgical operation to clean up the necrotic tissue to avoid inflammation aggravation.