Scrotal enlargement after hernia ligation may be caused by epididymitis, scrotal hematoma, trauma infection and so on. 1. Epididymitis: It may be due to postoperative bacterial infection or epididymitis caused by unclean sexual behavior, which may cause symptoms such as scrotal distension, scrotal enlargement and fever. 2. Scrotal hematoma: it may also be caused by incomplete hemostasis during surgery, postoperative trauma, etc. It may present symptoms such as pain, scrotum, swelling and redness. 3. Syringomyelia: If the patient has inguinal hernia combined with syringomyelia, the scrotum may still have a large appearance after surgery if the fluid is not extracted during the operation. After the fluid is absorbed, it may return to normal size. Patients are advised to go to the hospital regularly for review after surgery. At the same time, pay attention to the location of the operation to keep dry, to avoid re-infection of the wound, pay attention to a light diet, avoid spicy and stimulating food.