Numbness of the soles of the feet while sleeping in July after femoral neck surgery includes physiologic and pathologic causes. Among them, the pathology is mainly due to lower extremity venous thrombosis, nerve damage, etc.. 1. Physiological reasons: such as femoral neck fracture from the femoral head down to the femoral neck between the fracture, fracture surgery patients need a long time in bed to recover. Prolonged bed rest is likely to cause slow venous circulation in the lower limbs or impaired blood return to the feet, and thus numbness of the lower limbs and soles of the feet often occurs. 2.Pathologic causes (1) Lower extremity venous thrombosis: this is one of the common complications in patients who have been bedridden for a long period of time. Since venous thrombosis causes obstruction of blood flow in the lower extremities, symptoms such as lower extremity pain and numbness often occur. (2) Nerve damage: mainly due to intraoperative pulling or postoperative nerve damage, but also cannot exclude nerve damage caused by femoral neck fracture, etc. The specific situation should be evaluated in the hospital. If the above symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner to clarify the cause and give targeted treatment.