Most patients with cirrhosis have esophageal varices due to portal hypertension. The degree of esophageal varices is differentiated as mild, moderate or severe due to the different pressure levels of portal veins. The severe ones are prone to rupture and bleeding. The increased hydrostatic pressure and blood flow in the varices and the size of the varices and the thinning of the walls are the main causes of rupture and bleeding. Any factor that suddenly causes an increase in abdominal pressure can cause an increase in portal pressure. For example, violent cough; strenuous exercise; lifting heavy objects; constipation; full stomach hiccups; quarrelsome angry winter climate cold, cirrhotic patients due to reduced immune function, easy to suffer from respiratory diseases, coughing and sputum; winter drinking less water, resulting in constipation; cold weather people like to wear thicker, activity, heart rate accelerates, increased abdominal muscle movement when increasing gas; especially too full diet often leads to increased abdominal pressure, food reflux Reflux of food into the esophagus. All these reasons may cause the rapid increase of abdominal pressure and the sudden change of pressure difference between portal vein and esophageal vein, which makes the already thin esophageal vein wall rupture due to the steep increase of pressure. The patient vomits blood out of his mouth and his condition is very dangerous.