Many patients with osteonecrosis of the femoral head have encountered the problem that after a period of treatment, the symptoms have improved, but once they walk too much, the hip joint will still be painful. Is this a sign that the condition of osteonecrosis has worsened? After the treatment of osteonecrosis of the femoral head has improved, the pain in the hip joint still occurs after walking too much. This is because the patient has been suffering from the disease for a long time and the lower limbs are unable to carry out normal exercise, which leads to muscle atrophy or soft tissue adhesions in the lower limbs. When the patient walks too far or for too long, the thigh muscles will be fatigued, causing fatigue soreness, or the adhesions of the soft tissues will be strained, so there will be painful symptoms. The pain when walking too much after treatment of femoral head necrosis has certain characteristics: light or no pain in the morning, fatigue and soreness in the afternoon or evening. There are also patients who have fatigue and soreness only on a certain day when they walk too much, and this fatigue and soreness will disappear on the second day after rest or after a few days. The pain symptoms after treatment of femoral head necrosis are not a sign of the increasing severity of femoral head necrosis, but a sign of muscle weakness and fatigue in the lower limbs, or soft tissue adhesions caused by too much exercise, so patients do not need to worry too much. However, for rehabilitation exercise, you must follow the doctor’s advice and do not overexert yourself. In addition, some patients with femoral head necrosis will have recurrent pain after head preservation surgery, and the pain is obviously related to weather changes or exercise, which is often due to the head preservation surgery for femoral head necrosis, which only removes the lesions in the weight-bearing area, and some necrotic lesions will remain in the femoral head, and all of them will be removed to cause excessive femoral head defect, which is a last resort. This part of the necrotic lesion will be replaced slowly by sclerotic bone or normal bone, and eventually achieve the purpose of cure, which mostly takes 1-2 years. Therefore, patients should not be anxious and should have confidence that this pain will eventually be gradually reduced and eventually disappear.