Femoral head necrosis, also called ischemic necrosis of the femoral head, or aseptic necrosis of the femoral head, in the early stage, there will be pain at the root of the thigh, but many patients will think it is a muscle strain or sciatica and do not care much. By the time the pain intensifies and a radiograph is taken, it is already very serious. In addition to thigh root pain, what are the other signs of femoral head necrosis? 1. Knee pain and soreness in the lower limbs. Pain other than the hip may be caused by ischemic necrosis of the femoral head radiating, such as knee pain. 2.The pain in the hip increases when moving and walking. 3, walking limp, rest a while symptoms can be reduced Although the pathogenesis of femoral head necrosis is more complex, but the following categories of high-risk groups need special attention! 1, long-term excessive alcohol consumption of the population, usually in the age of 30-50 years, due to a large number of uncontrolled alcohol consumption, its chances of developing femoral head necrosis is three times that of the non-drinking population. 2.People suffering from lupus erythematosus, dermatomyositis, rheumatoid arthritis, blood diseases, etc. who need to apply hormones for a long time. 3.People who have had hip trauma, especially patients with femoral neck fracture. What exercises can strengthen the hip muscles and protect the hip joint? 1, hip bridge – strengthen gluteus maximus muscle strength 2, clam open and close exercise – gluteus maximus and gluteus medius muscle strength Ischemic necrosis of the femoral head, early treatment through symptomatic, reduce joint load, exercise the surrounding muscles, some patients can achieve pain relief and improve the blood supply of the femoral head, and need regular follow-up to observe the regression of the disease. Therefore, it is recommended that patients who frequently experience the symptoms mentioned above should visit a regular joint center in a timely manner to avoid missing the best treatment period.