Hard lumps on the tether after 100 days of circumcision may be scar hyperplasia, secondary infection, or lymphedema. 1. Scar proliferation: After circumcision surgery, the incision has healed in 100 days, but the incision site may have scarring hyperplasia, and if the hyperplasia is close to the tethered belt, the symptoms of hardness in the tethered belt may occur. 2. secondary infection: for example, the local soft tissue is infected by external bacteria, fungi and other pathogenic bacteria, causing local inflammatory reaction, resulting in soft tissue edema, longer time may form hard knots, resulting in hard lumps in the tether after 100 days of circumcision. 3. Lymphedema: due to the surgical stimulation caused by poor lymphatic drainage in the area of the prepuce tie, easily caused by local edema, nodules and other symptoms, will also cause hard lumps in the tie after 100 days of circumcision. There may be other reasons for the hardness of the tether after 100 days of circumcision, so it is recommended to go to the hospital in time for examination and to clarify the cause of the disease and the treatment prescribed by the doctor.