Scarring with closed injections generally will not lead to osteonecrosis of the femoral head. Closed injections generally contain a small amount of hormones and pain medication, and sometimes add some vitamins, because the amount of hormones is very small, and is not a long time to apply, so generally will not happen to the femoral head necrosis. There are many causes of femoral head necrosis, and prolonged application of large amounts of hormones is an important cause of femoral head necrosis. Prolonged use of hormones will cause a reduction or interruption of the blood supply to the femoral head, which will lead to necrosis of the femoral head. Sequestration is only a small amount of intermittent local application of hormones, generally will not cause significant impact on the blood circulation of the femoral head, so the sequestration injection generally does not cause necrosis of the femoral head. If you have any discomfort symptoms, you should go to the hospital in time and consult your physician for guidance.