Bleeding is also a complication of esophageal cancer. Sometimes cancer is not as simple as we think and sometimes it can cause complications during the treatment. Esophageal cancer can also occur in this way, and it is best to be aware of it in time. So, what kind of complications will occur in esophageal cancer? 1. Cachexia: Patients are in advanced cases, because it is difficult to swallow with each passing day, then, it will cause long-term starvation leading to negative nitrogen balance and weight loss, which has a direct impact on the incidence of complications after esophagectomy and surgical mortality. Virtually every patient with advanced esophageal cancer with symptoms of obstruction has varying degrees of dehydration and reduction in total body fluids due to their difficulty in eating through the mouth. Patients show cachexia and obvious water loss, which are highly emaciated, weak, loose and dry skin, and in a state of exhaustion. 2. Bleeding and vomiting blood: some of the esophageal cancer patients have vomiting, in addition, individual esophageal cancer patients may have vomiting blood due to tumor invasion of large blood vessels, and occasionally haemorrhage. Vomiting blood is usually a clinical symptom of advanced esophageal cancer patients. 3.Organ metastasis: If there is metastasis of important organs such as lung, liver and brain, respiratory difficulty, jaundice, ascites, coma and other specific symptoms of corresponding organs may appear. Patients with esophageal cancer who have esophage-tracheal fistula, supraclavicular lymph node metastasis and metastasis of other organs, laryngeal nerve paralysis and cachexia all belong to advanced stage esophageal cancer. 4.Sympathetic ganglion compression: sympathetic ganglion compression by cancer will produce sympathetic nerve paralysis (homer syndrome). 5.Disorders of water and electrolyte: such patients have the tendency to have severe hypokalemia and muscle weakness due to dysphagia. Normal people secrete about 1 to 2 liters of saliva every day, in which inorganic substances include sodium, potassium, calcium and chloride. The concentration of potassium in saliva is higher than that in any other gastrointestinal secretions, generally 20mmol/ml. 6. Caused by cancer metastasis: for example, cancer cells invade the recurrent laryngeal nerve causing vocal cord paralysis and hoarseness; tumor compression and invasion of trachea and bronchus causing shortness of breath and irritating dry cough; invasion of phrenic nerve causing diaphragm paralysis; invasion of vagus nerve causing accelerated heart rate; invasion of brachial plexus nerve causing It can also cause jaundice, ascites, liver failure, respiratory difficulty, coma and other complications. 7.Esophageal cancer perforation: late stage esophageal cancer, especially ulcerated esophageal cancer, can cause perforation due to local erosion and serious ulceration of tumor. Different symptoms appear depending on the perforation site and adjacent organs. Perforation of trachea causes esophagotracheal fistula, which presents choking and coughing anatomy when eating and drinking, especially when eating liquid diet; perforation of mediastinum can cause mediastinitis, with chest tightness, chest pain, cough, fever, accelerated heart rate and elevated white blood cells; perforation of lung causes lung abscess, with high fever, cough and pus sputum; perforation of aorta causes esophagoaortic fistula, which can cause hemorrhage and lead to death. Bleeding is also a complication of esophageal cancer. You should not be anxious about the occurrence of esophageal cancer, and it is best to go to regular hospital for treatment so that there will be treatment guarantee. In addition, it is also necessary to take care of the disease in life, a healthy care will also promote the occurrence of health.