(A) Overview Hip arthroscopy was first used by Burman in 1931, but compared with other joints such as the knee and shoulder, the development of hip arthroscopy has been relatively slow, mainly because the hip joint is anatomically deep, surrounded by thick tissue, and the joint is not easy to expand, and there are many important nerves such as the sciatic nerve and the lateral femoral cutaneous nerve around, which makes the choice of entrance risky. Unlike other arthroscopic techniques, hip arthroscopy was developed gradually from incisional surgery, because incisional surgery of the hip often involves some serious disorders, and many diseases treated by hip arthroscopy are often not given enough attention before. In recent years, hip arthroscopy has developed rapidly, mainly due to the improvement of diagnostic level, especially in imaging diagnosis, and the development of many corresponding microscopic instruments, such as the introduction of working trocar, the use of bendable endoscope, etc., which make the surgery easy to perform and achieve good efficacy. (B) Indications Common injuries that can be solved by hip arthroscopy include: acetabular labral tears, joint instability due to iliofemoral ligament loss, acetabular impingement syndrome, articular cartilage injury, femoral head ligament injury, hip popping, etc.; other disorders such as femoral head necrosis, synovial chondromatosis, synovitis, gout, post-traumatic joint free bodies, joint foreign bodies, infection, some hip adhesions, etc. Some mild to moderate osteoarthritis, slipped femoral epiphysis, Legg-Calvé-Perthes disease, etc. can also be treated by hip arthroscopy. (iii) Contraindications Absolute contraindications include joint adhesions or ankylosis, and infected lesions on the surface of the surgical area. Relative contraindications are severe ischemic necrosis of the femoral head, severe osteoarthritis and congenital dislocation of the hip joint. Other conditions are the same as knee arthroscopy. (iv) Surgical procedure The surgery is performed in the flat or lateral position. Traction of the lower extremity is often required, which is usually considered safer for less than two hours and does not cause nerve damage. Some people have also performed the procedure without traction and have achieved more satisfactory results by moving the joint to observe various parts of the joint. The procedure involves first introducing the joint with a guide needle, dilating the joint with water, making anterolateral, anterior, and posterior lateral incisions, and establishing an access route, often with the aid of x-ray fluoroscopy. Basically, the arthroscope can visualize almost the entire range of the hip joint. (E) Complications The incidence of hip arthroscopy complications is about 1.4-5.5%, such as nerve and vascular injury, temporary nerve injury, articular cartilage injury, instrument fracture, fluid spillage into the pelvic or abdominal cavity, foot, scrotum, perineal injury, infection, necrosis of the femoral head, etc. The overall incidence is very low, and most of the complications are caused by improper traction and water injection. Therefore, the occurrence of complications can be minimized by proper placement and protection of the body parts in contact with the traction device during the procedure. It can be said that hip arthroscopy is a safe, minimally invasive and effective treatment method, especially in sports trauma, which helps athletes improve their performance and return to competition.