Hernia is commonly known as “small intestine cascade”, and inguinal hernia is the most common. The incidence of inguinal hernia is significantly higher in men than in women, with a male to female ratio of 15:1, and is associated with various factors such as abdominal laxity due to extreme obesity and weight loss, cough, constipation, age, and genetics. With the continuous progress of hernia repair techniques, tension-free hernia repair techniques are gradually being widely adopted because of their in situ, tension-free, simple operation and mild pain in the early postoperative period. With the development of new technology, the recurrence rate after hernia repair has decreased significantly, and the recurrence rate is about 1%, while chronic postoperative pain as another major complication after hernia repair is often not paid attention to, but it affects the quality of life of patients, and some patients may develop psychological disorders such as depression or anxiety as a result. There are many factors affecting post-operative pain after hernia repair, which are usually divided into two categories: patient factors and surgical factors. Patients who are young, obese, have a history of preoperative pain, have a stable occupation, and have health insurance are prone to chronic postoperative pain. It was found that patients aged <40 years with an occupation (full-time) were more likely to have chronic pain, and patients with preoperative pain had a high propensity for postoperative pain. In terms of surgical factors, open surgical repair, use of patches, injury to nerves, intentional cutting of nerves, postoperative infection or hematoma, and hernia recurrence are all common causes of chronic pain. More attention is now being paid to chronic pain in the groin area after surgical procedures and to a range of problems that clearly affect health-related quality of life. Physical therapy, nerve blocks, medication, psychotherapy, and surgery are the treatment options available for chronic pain after inguinal hernia surgery.