Generally, lying flat is required for 6 hours after surgery, mainly to better keep the respiratory tract open and prevent the occurrence of reactions arising from the metabolic process of anesthetic drugs. After general anesthesia, although the person has been awake, but the legacy of anesthetic drugs can not be immediately metabolized completely, the patient may have gastrointestinal reactions, lying down helps to cough up the stomach contents and prevent asphyxia. In patients with lumbar anesthesia, the dura mater is punctured during anesthesia, and cerebrospinal fluid will flow out from the puncture point. The patient needs to lie flat to promote the healing of the dura mater and reduce the possibility of postoperative hypocranial pressure headache. In addition, lying down in a good position after surgery is not only good for detecting changes in blood pressure and heart rate, but also for avoiding postoperative wound bleeding or dehiscence. It is recommended that patients maintain a good routine after surgery, rest more, do not need to be too nervous and anxious, make reasonable adjustments according to the doctor’s recommendations, and follow the doctor’s instructions for reasonable medication.