Right pelvic to knee pain may be caused by lumbar disc herniation, pyriformis syndrome, femoral head necrosis and other diseases, patients can take medication, surgical treatment. 1. Lumbar disc herniation:Patients with lumbar disc herniation will have lower limb pain, hip pain along the thigh, claudication and other symptoms. Patients can take oral ibuprofen extended-release capsules, diclofenac sodium extended-release tablets and other non-steroidal anti-inflammatory drugs as prescribed by the doctor for pain relief, and can also take oral cloxazone tablets, fluoxetine maleate capsules and other muscle relaxants for treatment. Some patients can take spinal endoscopic nucleus pulposus removal, hemilaminectomy and other surgical treatments. 2. Piriformis syndrome: Piriformis syndrome patients will have hip pain and reflex pain in the lower limbs and other symptoms, patients can follow the doctor’s instructions oral celecoxib capsules, meloxicam tablets and other non-steroidal anti-inflammatory drugs, but also can be injected with prednisolone acetate injection, triamcinolone acetonide injection, and other steroidal drugs treatment. Patients can also take surgical treatment, such as pear-shaped tendon amputation, sciatic nerve pelvic outlet expansion and decompression surgery. 3. Necrosis of the femoral head: the main symptom of necrosis of the femoral head is pain in the groin area, which can radiate to the hip or knee joint. Patients can take oral anticoagulant drugs such as low molecular heparin sodium tablets and warfarin sodium tablets as prescribed by the doctor, and they can also take oral alendronate sodium tablets and other phosphate preparations for treatment. In addition, patients can also take hip preservation surgery, artificial hip replacement surgery and other surgical treatments. When patients experience symptoms of right pelvic to knee pain, they should seek timely medical attention to identify the cause of the disease and follow the doctor’s instructions for treatment.