There are many clinical causes of thigh root pain, commonly considered bone and joint diseases, inguinal lymphadenitis, chronic pelvic inflammatory disease, herpes zoster, etc., as follows: a. Bone and joint diseases: patients with hip synovitis, hip osteoarthritis, pyogenic myelitis, femoral head necrosis, will lead to the presence of significant pain symptoms at the root of the thigh, to make a clear diagnosis, the hip joint needs to be MRI examination of the hip joint. Second, inguinal lymphadenitis, chronic pelvic inflammatory disease, herpes zoster: If the patient has inguinal lymphadenitis, chronic pelvic inflammatory disease, herpes zoster, it will also lead to significant pain symptoms at the root of the thigh. Tumor or metastasis: If there is a primary tumor or metastasis of the femur, it will also lead to significant pain symptoms at the root of the thigh. Soft tissue injury and fracture: soft tissue injury, femoral neck fracture, intertrochanteric fracture and acetabular fracture caused by external force will also lead to significant pain symptoms at the root of the thigh.