Closed injection therapy is not recommended for the pain caused by femoral head necrosis. Because closed injection therapy contains not only anesthetics but also hormones, which can affect the blood circulation of the femoral head, and the long-term application of large amounts of hormones is also a common cause of femoral head necrosis, so closed treatment is not recommended for femoral head necrosis. If closed treatment is carried out, it will aggravate the blood circulation disorder of the femoral head and aggravate the progress of necrosis. So when there is a very painful femoral head necrosis, analgesic treatment can be taken accordingly, such as oral pain medication, intramuscular pain medication, intravenous pain medication, and other means to take strong analgesic drugs. But these analgesic treatments do not solve the fundamental problem. If the severe pain of femoral head necrosis occurs and the relief is not very good, the corresponding joint replacement treatment can be performed.