Pain at the connection between buttocks and thighs consider sacroiliitis, lumbar disc herniation, muscle strain, femoral head necrosis, take medication, physical therapy or surgery for the cause. 1. Sacroiliac arthritis: need to stay in bed, pay attention to local warmth. Oral non-steroidal anti-inflammatory drugs such as diclofenac sodium enteric-coated tablets or ibuprofen extended-release capsules can be taken, and ultrasonic physiotherapy or deep heat therapy can be adopted. 2. Lumbar disc herniation: take lumbar traction, acupuncture and physiotherapy, oral nutritional nerve drugs such as methylcobalamin dispersible tablets, oral non-steroidal painkillers such as celecoxib capsules or ibuprofen extended-release tablets. Minimally invasive intervertebral disc removal surgery if conservative treatment is not effective. 3. Muscle strain: Oral muscle relaxants such as Cloxazone. Tui na massage and medium frequency pulse physiotherapy can be used to relax the local muscles. 4. Femoral head necrosis: decompression and bone grafting surgery can be performed for necrosis below the third stage, and if the femoral head collapses, femoral head collapse surgery can be performed. If the femoral head collapses, the femoral head should be collapsed. The pain in the connection between the buttocks and thigh muscles should go to the orthopedic department of the hospital. The use of drugs need to follow the doctor’s instructions.