The joint of thigh root and hip bone looks like twisted tendon, the possible causes are tendonitis, femoral head necrosis, labral injury, hip impingement syndrome, which can be treated by general treatment, physical therapy, medication, surgery and so on. 1. Tendonitis: It may be aseptic inflammation due to tendonitis caused by long-term friction or chronic injury to the tendons of thigh root and hip bone. Physiotherapy can be carried out on the local position of the hip joint, such as heat therapy, electrotherapy, ultrasound therapy, etc., which can promote blood circulation and relieve cramps. If the pain symptoms are obvious, you can take oral non-steroidal anti-inflammatory drugs such as ibuprofen extended-release capsules, diclofenac sodium, celecoxib, etc., which can relieve pain and eliminate local inflammation. 2. Necrosis of the femoral head: It may be caused by ischemia of the femoral head, structural changes of the femoral head, collapse, etc., and the phenomenon that the thigh root and hip bone joints look like twisted tendons. For patients with early necrosis of the femoral head, they should control their weight and avoid weight bearing. Oral anticoagulant drugs and vasodilator drugs, such as prostaglandin and warfarin, can be taken to relieve symptoms. If necessary, hip preservation surgery and hip replacement surgery can be treated. Hip preservation surgery includes core decompression surgery and hip osteotomy. The common hip replacement surgery is artificial hip arthroplasty. 3. Labral injury: Labral injury may be caused by acute trauma, hip dysplasia, hip dislocation and acetabular fracture. Deep squatting and sedentary movements should be minimized. Oral non-steroidal anti-inflammatory drugs such as meloxicam, ibuprofen, diclofenac sodium, etc. can effectively relieve pain. When conservative treatment is not effective, surgical treatment can be performed, such as minimally invasive hip arthroscopy, labral repair, labral reconstruction, and so on. All of the above medications should be used under the guidance of a doctor, avoid self-medication. If the above symptoms occur, it is recommended to go to regular hospitals for consultation and early treatment.