After being pricked by a needle is mainly to prevent: first, the local formation of hematoma, which requires pressure on the pricked area generally for about ten minutes to reduce local bleeding, while local cold compresses, can inhibit vasodilation, can reduce local bleeding. Second, also need to prevent local infection, which requires local application of topical drugs such as iodophor or Bactrim, if necessary, can also cephalosporin and penicillin drugs taken orally, in the diet also need to be adjusted, such as not eating too spicy food, such as chili, spicy food, spicy hot pot, do not drink alcoholic beverages, while the injured place can not get wet, to prevent contamination, the formation of infection. Third, but also to prevent tetanus, which needs to go to the hospital emergency or surgery, tetanus injection to prevent sequelae. Fourth, the need to prevent local scar formation, you can apply scar paste, or apply scar cream to reduce scarring.