After a major surgery, it is recommended not to sleep on pillows for 6 hours. Because it is possible that after the surgical anesthesia, the anesthetic drugs have not been completely metabolized properly, and if you sleep on a pillow, it may cause the patient to experience dizziness, headache, nausea, vomiting and other symptoms. It is generally recommended to sleep on a pillow only after 6 hours when the anesthetic medication has been completely metabolized. It is also necessary to continue to monitor the changes in the patient’s vital signs, such as heart rate, blood pressure, pulse rate, oxygen saturation and other conditions. If the patient shows symptoms such as nausea and vomiting, the head should be tilted to the side to prevent aspiration pneumonia after vomiting. After 6 hours, if the patient recovers from anesthesia, it is recommended that he/she be in a semi-recumbent position with a pillow to promote recovery of lung function and prevent pulmonary atelectasis.