It may be caused by over-exercise of the thigh muscles, cold or hip joints themselves, as well as lesions at the lumbar spine. Soreness may be caused by over-exercise and localized muscle strain, or it may be caused by cold or aseptic inflammation of the hip joint, resulting in soreness at the root of the thigh. Physical laborers or athletes long time weight bearing or strenuous exercise, resulting in repeated friction hip joint muscles, causing chronic strain, and then will cause this part of the soreness and pain. Diseases of the hip joint itself can also cause soreness at the root of the thigh, such as synovitis of the hip joint, bursitis, necrosis of the femoral head, degenerative changes of the hip joint and so on. It may also be due to lumbar disc herniation, resulting in spinal nerve roots and peripheral neurovascular compression and stimulation, resulting in soreness and pain at the thigh root, it is recommended that the patient go to the hospital for examination, to clarify the cause of the disease and then carry out symptomatic treatment.