Thigh muscle pain may be caused by physiologic pain, muscle injury, lumbar spine disease, hip joint disease and other reasons. 1. Physiological pain: If there is no relaxation of thigh muscles after physical exercise or fitness, it may lead to abnormal accumulation of lactic acid in the muscles, so thigh muscles are sore. 2. Muscle injury: due to external blows, strenuous exercise, etc., it may lead to muscle injury in the thigh area and muscle edema, so it causes thigh muscle pain. 3. Lumbar spine disease: If you suffer from lumbar disc herniation, lumbar spine slipped and other diseases, it may compress the nerve root of the lower limb, resulting in neurological pulling pain in the thigh. 4. Hip joint diseases: If you suffer from hip joint diseases, such as necrosis of the femoral head, synovitis of the hip joint, etc., it will also stimulate and cause muscle pain in the inner thigh. If the thigh muscle pain has not been relieved, it is recommended that the patient go to the hospital in time to clarify the cause of the disease, and follow the doctor’s instructions for treatment.