The majority of the lumps on the scar refers to the hard lumps on the incision after cesarean section. Most of the lumps are caused by endometriosis in the abdominal incision during the cesarean section operation, and the ectopic lesion will bleed periodically with menstruation, which will form hard lumps locally over a long period of time, and there will be obvious tenderness or pressure pain, and the pain will be more serious when menstruation occurs. Surgery can be done to remove the treatment, after the operation need to continue to use drugs to prevent recurrence, the most commonly used drugs is to use Dafirin, continuous use of drugs for about 3-6 months, to achieve the purpose of preventing recurrence.