Numbness of hands and feet after surgery may be related to prolonged braking, or it may be caused by the application of anesthesia, or damage to the nerves of the limbs. 1. Prolonged braking: Especially in the case of long surgery for major diseases, the body is in a state of braking for a long time, resulting in poor blood return to the endings of the extremities, which may cause numbness of the hands and feet after surgery. 2. Application of anesthesia drugs: before surgery often need to inject patients with anesthesia drugs, especially general anesthesia drugs, and it takes a long time after surgery to be completely metabolized, so after surgery due to anesthesia has not been completely metabolized, may cause numbness in the hands and feet. 3. Extremity nerve damage: common in car accidents, due to limb injury, there is a certain degree of damage, after the injury is likely to cause damage to the limbs of the local nerve damage, resulting in impaired blood supply to the damaged nerves, resulting in sensory abnormalities, the operation is difficult to completely reverse this injury, after the operation will show numbness of the hands and feet after surgery. Numbness of hands and feet after surgery may also be caused by other reasons, if the symptoms never improve, you should seek medical advice as soon as possible, after clarifying the causative factors, the doctor will guide the treatment.