Bleeding of esophageal cancer is a critical complication of esophageal cancer patients, which is commonly caused by improper diet, rupture of blood vessels due to cancerous tissues, invasion of blood vessels by cancerous tissues, as follows: 1) Improper diet: hard food is eaten, which may cause bleeding by breaking the capillary vessels of the cancerous part of the esophagus. 2) Rupture of blood vessels due to cancerous tissues: the blood vessels may be ruptured by cancerous tissues necrosis or ulceration, which may result in bleeding. 3) Invasion of blood vessels due to cancerous tissues: the middle part of the Esophageal cancer can invade into thoracic duct, odd vein, pulmonary hilar and lung tissues, and part of it invades into pulmonary artery causing hemorrhage, which can easily lead to life-threatening situation. No matter which reason it is, once esophageal cancer patients have gastrointestinal bleeding, they should go to hospital in time to avoid hemorrhage, suffocation and hemorrhagic shock. When bleeding from esophageal cancer occurs, stop eating and drinking immediately, don’t feed anything from mouth, lie down in flat position with head tilted to one side or lateral position to prevent choking and coughing from vomiting blood, which may cause suffocation. Try to relax the patient to avoid aggravating the bleeding due to emotional stress, call 120 ambulance at the first time, and observe the patient’s temperature, pulse, and mental state and other changes during the waiting period for rescue. If you seek medical treatment on your own, try to avoid bumps or emergency braking on the road to prevent inducing vomiting blood again and aggravating the condition.