Esophageal cancer is a malignant tumor occurring in the epithelial tissue of esophagus, accounting for 2% of all malignant tumors. Every year, about 200,000 people die of esophageal cancer in the world, and China is a high incidence area of esophageal cancer, and the deaths of esophageal cancer are second only to gastric cancer, and the age of onset of esophageal cancer is more than 40 years old, and men are more than women, but the incidence of people under 40 years old has a tendency to increase in recent years. What are the clinical symptoms of esophageal cancer? Here is an introduction. The main clinical symptoms of esophageal cancer are progressive aggravation with the development of cancer foci. Early symptoms: (1) Hard choking sensation in swallowing food, which occurs occasionally and does not affect eating. (2) Pain and discomfort at the back of sternum or upper abdomen, mostly accompanied by dysphagia. (3) Foreign body sensation in the esophagus, most of which is the discomfort of not being able to spit out or swallow. (4) Dryness and constriction in the throat. (5) Slow passage of food and feeling of retention. (2) Symptoms of middle and advanced esophageal cancer: (1) Progressive dysphagia: it is the most common and typical symptom, which represents the degree of narrowing and obstruction of esophageal lumen. (2) Vomiting mucus. (3) Chest and back or hypopharyngeal pain. (4) Metastatic symptoms and signs: neck mass; hoarseness; compression of cervical sympathetic nerve, compression of trachea and bronchus, invasion of phrenic nerve, invasion of vagus nerve compression of superior vena cava, invasion of pleura, spine, involvement of brachial plexus nerves, etc.; corresponding symptoms caused by metastasis to the liver, lungs and brain. (5) Esophageal hemorrhage. (6) Esophageal perforation: esophagus-a-trachea or bronchus repeatedly, esophagus-a-aorta, esophagus-a-lung, esophagus-a-mediastinum healed, etc.