When it comes to lumbar pain or low back pain, most orthopedic surgeons and patients immediately think of lumbar disc herniation or lumbar spondylolisthesis, and all orthopedic textbooks describe it this way, so the doctor’s examination often revolves around the lumbar spine, and if a problem with the lumbar spine happens to be detected, the diagnosis is often considered clear, and if not, the doctor will often consider damage to the muscles or fascia of the lumbar region and treat around these, and some patients get relief as a result. Some patients have found relief as a result. However, in recent years, with the continuous development of hip surgery abroad, some doctors have discovered that a lot of low back pain or associated leg pain is actually not in the low back, but in the hip joint, which can occasionally be caused by femoral acetabular impingement, but more often caused by iliopsoas tendon acetabular impingement. Iliopsoas tendon acetabular impingement is a new concept introduced by foreign hip surgeons in recent years, which refers to the abnormal protrusion of the acetabulum or the anterior femoral head or the loss of normal elasticity of the tendon after chronic injury and inflammation, resulting in abnormal impingement of both. Patients with iliopsoas tendon impingement mainly present with low back pain or lumbosacral pain, inability to stand for long periods of time, inability to lie down for long periods of time at night while sleeping, and a few present with pain in the groin area, which may be accompanied by weakness in lifting the leg, sometimes difficulty in putting on socks and popping. If combined with lumbar disc herniation, it may be accompanied by numbness of lower limbs. Severe impingement of the iliopsoas tendon may lead to inability to walk or even difficulty in turning over. The treatment is mainly through ultrasound-guided precise point closure, the patient’s pain can be immediately obvious or completely relieved, most of them can be completely relieved the same night or the next day, and a few patients can be completely relieved after 1 week. In some patients, the pain is not completely relieved and is often associated with an impact-related tear of the acetabular labrum, which requires arthroscopic surgery. In patients with low back pain or with leg pain, if the diagnosis is lumbar disc herniation or mild lumbar spondylolisthesis and the symptoms are predominantly painful with no or very mild numbness, care should be taken to rule out iliopsoas tendon impingement before proceeding with treatment.