Finger cut but there is a bag, may be related to scar hyperplasia, wound infection and other conditions, according to the cause of the disease through medication (cumulonimbus cream, etc.), surgical treatment and other methods of treatment. 1. Scar hyperplasia: If the patient himself belongs to the keloid, as long as there is a small wound on the body, scar hyperplasia will be formed during the recovery period, the scar will bulge in the wound area, the color may be dark purple or dark red. Minor patients can be treated by applying cumulonimbus cream, and if necessary, treated by surgical excision. 2. Wound infection: the skin may have healed on the surface, but there is still inflammatory infection inside the wound, and the bulge is filled with purulent secretions and decayed tissue. It is necessary to incise the bulging bag to drain out the purulent secretion inside, and then use anti-inflammatory drugs such as cefuroxime to treat the infection. After surgery, infrared radiation and other physical therapy measures can be given to promote healing. It is recommended that the patient consult a doctor in a timely manner to determine the cause of the disease, and then strictly comply with the doctor’s instructions for treatment.