Needle stick injury refers to the penetration of a thin foreign object into the body, such as a nail or a syringe. If it is a clean object into the body, then do not worry too much, local pressure can be applied with clean gauze to stop the bleeding, and then apply iodophor or Bactrim for anti-inflammatory, waiting for the wound to heal. If it is a more contaminated foreign body pierced into the body, such as rusty nails, you need to go to the hospital as soon as possible to give a clean and change the medicine, but also need to play tetanus injection to prevent tetanus, preferably within 24 hours after the injury, when the best effect, beyond the time can also play, but the effect is poor. During the treatment period, you should avoid drinking alcoholic beverages, try not to eat too spicy food, and consume fresh fruits and green vegetables to promote the healing of the wound as soon as possible.