A study was conducted on the sleeping position of thousands of patients with cerebral infarction, and it was found that more than 95% of the patients were accustomed to lying on their sides. Such a sleeping position aggravates the patient’s blood flow disorder, especially the slowing down of blood flow in the neck, and makes it easy for blood to gradually gather and form thrombus at the endothelial injury of the artery. These patients should be changed to supine lying is more appropriate. Middle-aged and elderly patients with emphysema should lie on their backs and elevate their heads, while slightly extending their hands upward to keep their breathing open. Patients with gastric ulcers should be advocated to lie on their left side. If lying on the right side, the acidic fluid reflux from the stomach to the esophagus is much more than normal, and it is constant, which can cause burning pain in the stomach.