Lumbar hernia is a hernia that occurs in the posterior lateral abdominal wall between the 12th rib and the iliac crest, and has a low overall incidence, accounting for only 1.5% to 2.0% of all extra-abdominal hernias. There are 2 lumbar triangular gaps: ① The supra-lumbar triangular gap (Grynfeltt-Lesshafttriangle) is a triangular gap enclosed by the 12th rib and part of the lower edge of the posterior inferior serratus muscle, the erector spinae muscle, and the internal oblique muscle of the abdomen, with the transversus abdominis tendon membrane at its base. The supragluteal triangle was found in 93.5% of the population in autopsies. It is more likely to form a hernia than the lower lumbar triangle because of its relative width. The inferior lumbar triangle (Petittriangle) is surrounded by the latissimus dorsi, external oblique abdominis and iliac crest, with the internal oblique abdominis at the base. According to autopsy statistics, the lower lumbar triangle is found in 63% to 82.5% of the population. There are two types of lumbar hernias: congenital and acquired. Hernias caused by dysplasia of the muscles or fascia of the lumbar back during the embryonic period are called congenital lumbar hernias. Hernias caused by advanced age, wasting, disease, trauma or surgery to the low back are called acquired lumbar hernias, and the specific causes may be related to damage, atrophy, rupture, or defect of the muscles of the low back. Since there is only one layer of tendon membrane at the bottom of the upper lumbar triangle and the bottom of the lower lumbar triangle is protected by the internal oblique muscle, the incidence of upper lumbar triangle hernia is much higher than that of lower lumbar triangle hernia in clinical practice. Clinical manifestations: The main manifestation is a reversible mass in the lumbar back. When the mass is small, there is no clinical manifestation, but when the mass is large, there may be distension, numbness, nausea and vomiting. Physical examination: when standing or increasing abdominal pressure, a round or oval mass may appear in the lumbar back, which may be painful and uncomfortable, with soft texture, clear boundaries and smooth surface. The lumbar triangle can often be palpated at this point, and the lump can be pressed with the fingertip, and the fingertip can be coughing, and the lump can reappear after releasing the finger. CT is of great value in the diagnosis of lumbar hernia because it can show the nature of the hernia sac contents and at the same time, it can show more clearly the area of the lumbar back muscle defect and its extent. There are no clinical norms or guidelines for the treatment of lumbar hernia. Most people believe that the treatment of lumbar hernia should be mainly surgical. If the patient’s general condition is poor, complicated by serious cardiopulmonary disease, and assessed to be unable to tolerate surgery, the use of elastic girdle to bind the lumbar region may be considered to relieve the symptoms. When there is no contraindication to surgery, surgical treatment can be considered. In the past, the traditional Dowd procedure, which involves removal of the hernia sac and repair of the hernia ring with a stack of sutures using the fascia and muscles of the lumbar back, was mostly performed, which is very traumatic, with severe postoperative pain, straining and pressure, and a high recurrence rate. In recent years, with the development of surgical techniques and hernia repair materials, Zhang, director of the Department of Hernia and Abdominal Wall Surgery of Ningda Hospital, has widely used extraperitoneal tension-free hernia repair for lumbar hernia surgery. Some scholars have used lumpectomy to repair lumbar hernia, such as total extraperitoneal lumbar hernia repair with retroperitoneal approach and complete extraperitoneal lumbar hernia repair with a single hole, which have achieved certain efficacy.