Excessive sputum is usually not esophageal cancer, and it is mostly considered to be caused by chronic bronchitis, pneumonia, lung abscess and other diseases. 1. Chronic bronchitis: the cause of the disease is still unclear, and it is mostly considered to be related to infection, impaired immune function, airway hyperreactivity, etc. Smoking, occupational dust, chemical substances, etc., can also induce chronic bronchitis. Cough, sputum, wheezing, shortness of breath and other symptoms often occur, and the amount of sputum is usually more in the early morning, but also in the change of position and get up to stimulate sputum. 2. Pneumonia: It is usually caused by pathogen infection, and is also related to factors such as turbid air, age and impaired immune function. Patients often have symptoms of coughing, coughing up sputum, and some patients also have thick sputum or bloody sputum, and even accompanied by shortness of breath, dyspnea and other phenomena. Patients may also have acid-base imbalance, electrolyte disorders, neurological disorders and so on. 3. Lung abscess: usually due to bronchial obstruction, pathogenic bacterial infection, systemic immunity reduction and other conditions, and also related to alcoholism, periodontal disease, oral uncleanliness and other factors. Patients often appear high fever, cough, cough a lot of purulent sputum and other symptoms, and in severe cases can also be manifested as hemoptysis. Some patients may also suffer from loss of appetite, night sweats and fatigue. It is recommended that patients with profuse sputum should consult doctors in time to clarify the cause of the disease and carry out targeted treatment. If the diagnosis is esophageal cancer, attention should be paid in time and reasonable treatment should be provided.