A pencil lead lodged in the flesh left untreated for a long time can lead to skin pigmentation, infection, and pus. Pencil lead contains carbon, which can cause localized skin pigmentation if accidentally inserted into the flesh and left untreated. In addition to carbon, pencil lead may also contain soil and other components, inserted into the flesh without treatment, can be stored in the tissue for a long time, becoming a “foreign body”, which will cause local wound infection, and then appear in the wound site of the skin temperature, redness, swelling and pain of the symptoms of the wound, the state of serious wounds will be aggravated, which will lead to sepsis. After the pencil core enters the skin, you should go to the hospital in time, take it out under the operation of the regular doctor, and then carry out thorough disinfection, and keep the wound clean and dry before the wound heals, in order to facilitate the recovery of the wound.