1. Bursitis of the greater trochanter, swelling of the posterior aspect of the greater trochanter, pain, pressure, especially when moving, and inability to lie on the side. If the swelling of the bursa is obvious, the posterior depression of the greater trochanter disappears and a limited painful mass can be palpated locally. The affected limb is often externally rotated and flexed. When the hip joint is internally rotated, the local pain increases, while when the hip joint is passively extended and flexed, there are no obvious symptoms. 2, hip sprain The main symptom is pain around the hip joint, often sharp pain like tugging or dull pain like strangulation, aggravated by activity and reduced when sitting and resting. Most patients have a limp when moving, sometimes in a jumping gait with toe on the ground to support walking. In severe cases, motion may be completely restricted. There may be swelling and bulging of the affected hip compared to the healthy side. There is deep pressure pain on compression. In some patients, hardened cords of tissue can be palpated around the hip joint, and the pressure pain is most pronounced here. Hemorrhage, inflammation and reflex spasm of the muscle bundles (due to the muscle pull reflex) caused by subtle injuries to the muscles and ligaments are the main causes of the pathological basis of the injured local tissues and the symptoms. 3, femoral nerve entrapment syndrome Early or acute entrapment manifests as pain in the anterior medial thigh, calf and medial foot, numbness, pain hypersensitivity, aggravated by hip flexion, and pressure pain in the lateral aspect of the artery in the inguinal region, and radiates to the above area. Femoral nerve tension test is positive. In the later stage or chronic compression, it shows hypesthesia, numbness, pain, and reduced muscle strength of quadriceps atrophy in the above area.