Nail foot after healing hard lumps may be residual foreign body, scar hyperplasia, there may be inflammation and infection, etc., the causes are different, the treatment is different, you should find out the cause of the disease, and the cause of the treatment. 1. Residual foreign body: after a nail is stuck in the foot, if the foreign body is not taken out in time, a foreign body may be formed, accompanied by pressure and pain and other symptoms. Usually, it is necessary to perform local incision after disinfection and anesthesia to take out the local foreign body and disinfect it thoroughly, and then suture and bandage. 2. Keloid scarring: Scarring is the final result of human trauma repair, usually after the healing of trauma can be accompanied by varying degrees of scar formation. The local skin of hyperplastic scar can become hard and thickened, accompanied by itching and pain. Silicone gel can be used topically to soften the scar and reduce local itching and pain. If necessary, surgical treatment, such as scar excision direct suture surgery. 3. Inflammatory infection: after the nail is stuck in the foot, pathogenic microorganisms can invade the wound, if the wound is not thoroughly cleaned and sterilized in a timely manner, inflammatory infections may occur inside the wound after healing, which may be accompanied by obvious swelling and pain. Generally need to use antibiotics for treatment, such as oral amoxicillin and other antibiotic treatment, if necessary, need surgical treatment. Nails stuck in the foot, you should promptly consult a doctor for thorough disinfection, debridement and removal of foreign objects to reduce the occurrence of adverse complications.