After a patient’s hip fracture surgery, after a period of recuperation, the hip joint was not significantly uncomfortable, so they went to the hospital to remove the hip screw, but there are some patients, in a very short period of time, hip pain, why is this? Are the screws not supposed to go? Inhibit or other reasons? The reason for the formation of this pain may be mainly related to the collapse of the joint surface. After the internal fixation was removed, the femoral head was hollowed out and no effective supporting bone was formed before the patient thought he could walk, and there was no obvious discomfort for a short time, so he boldly and assuredly put on weight, but one day, there was a sudden hip pain, and he could not even walk, so he went to the hospital for examination, and the X-ray found that the femoral head had necrosis-like changes. The patient could not believe it, and even the doctor did not understand how this could happen. It is actually very simple, it is mainly due to premature weight-bearing and the joint surface is collapsed. This drawback can be effectively avoided if there is a period of protective less weight-bearing after surgery, which, if a specific time limit is added, I think is 3-4 months. A small number of patients coincidentally develop secondary traumatic joint, which is just a theoretical possibility of existence. This is due to the lack of effective cartilage repair, resulting in direct weight-bearing friction of the bone and lack of cartilage cushioning, which in turn causes pain. Once the cause is known, treatment can be directed. Patients should try to minimize weight bearing and apply medications that improve cartilage metabolism to help relieve symptoms. If the result is not good, further individualized treatment plan is needed.