Many pregnant women who have already given birth soon may experience limb pain in late pregnancy, for example, some patients may experience pain in the thigh root, whether it is the left side or the right side, if the pain occurs it is often necessary to find the cause, to see what causes the pain in the thigh root. Anatomically, the thigh root corresponds to the orthopedics refers to the hip joint, especially the femoral head position, and the cause of pain is mostly due to cold, fatigue, trauma, or excessive activity, which can cause aseptic inflammation. In late pregnancy, women’s stomachs are larger, the body burden is heavier, and the body’s normal standing line of force will be shifted, often due to the involvement of aseptic inflammation and trigger pain. Of course, we also have to be vigilant that there is no femoral head necrosis or other problems that cause pain, for example, lumbar spine problems may also be strung to the root of the thigh and cause pain. In this case, it is important to combine a face-to-face clinical examination and even imaging to help the doctor determine what kind of disease is causing the pain.