Complications after inguinal hernia surgery are as follows: 1, recurrence: generally more formal medical institutions in the promotion of tension-free repair, that is, the use of patch repair technology, the overall recurrence rate can be controlled at less than 1%, and part of the medical center can be controlled at less than 0.2%; 2, chronic pain: postoperative pain more than 3 months belongs to the chronic pain, which can be caused by the surgery nerve damage, compression or a combination of psychological factors of the patient; 3, infection: because the patch infection can occur 1 week or months or even years later, but since the standardized surgery, minimally invasive surgery after the chronic pain: the patient may not have a good understanding of the pain. It may be caused by nerve damage, compression during surgery, or the patient’s psychological factors; 3. Infection: because patch infection can occur 1 week or several months after surgery, or even several years later, but since the promotion of standardized surgery, minimally invasive surgery, the incidence of chronic pain and infection is relatively low, generally below 1%; 4. Seroma: a relatively common complication, the incidence of which is about 3%-5%, the harm of seroma is relatively low. Seroma is less harmful and can be gradually absorbed by most patients through close observation. So overall, inguinal hernia surgery is a very safe surgery, the overall incidence of complications is relatively low.