Children always swelling one year after circumcision may be due to inflammatory lesions, poor blood flow, trauma, poor lymphatic reflux and other reasons. It is recommended that patients go to the hospital in time in order to clarify the specific causes. 1. Inflammatory lesions: If the wound is not properly cared for after surgery, such as bacterial or fungal infections at the wound site, or infections such as mycoplasma and chlamydia. 2. Poor blood flow: If the venous return of the tissues is not good after the surgery, it will lead to the accumulation of blood in the local tissues, which may result in swelling one year after the circumcision. 3. Trauma: It may also be due to the fact that in the process of recovery from surgery, the local tissues have been squeezed, or impact injuries, causing local capillary rupture and bleeding, which may cause the symptoms of swelling after one year of circumcision. 4. Poor lymphatic reflux: swelling one year after circumcision may be due to the presence of poor lymphatic reflux in the local tissues, leading to the accumulation of lymphatic fluid in the surgical site, resulting in swelling. Always swollen one year after circumcision may also be caused by other factors, parents are advised to take their children to the regular hospital in time, ask the doctor to clarify the cause of the disease, give targeted treatment.