The onset of esophageal cancer is insidious, and some patients have a foreign body sensation in the esophagus, or a slow or obstructive choking sensation since the passage of food. Some patients have foreign body sensation in the esophagus, or slow or obstructive gagging sensation when passing food. It may also be manifested as burning, pins and needles or pulling pain at the back of sternum when swallowing. Progressive esophageal cancer often consults the doctor because of dysphagia, which develops progressively, or even can not eat at all. It is often accompanied by vomiting, epigastric pain, weight loss and other symptoms. In the advanced stage of the disease, due to long-term insufficient food intake, it may be accompanied by obvious malnutrition, emaciation, malignant disease and complications such as cancer metastasis and compression. For example, hoarseness caused by cancer compression of recurrent laryngeal nerve, pain caused by bone metastasis, jaundice caused by liver metastasis and other symptoms. Symptoms of esophageal cancer are the methods of self-diagnosis for patients: 1. Weight loss: in people’s daily life, patients will suffer from weight loss due to decreasing intake of food, persistent emaciation, dehydration and fatigue. Pain: According to the research, patients’ post-thoracic and subxiphoid pain is the typical symptom of the disease, and the pain will be hidden pain, burning pain or friction-like pain, which is the most obvious self-diagnosis method of esophageal cancer. Perforation: When the condition of the patient deteriorates to a certain degree, the tumor will cause perforation of the esophagus, and due to different degrees, the patient will have high fever, rapid pulse and chest pain, and choking and coughing when drinking water. Vomiting: With the continuous development of cancer, it will cause different degrees of obstruction to the esophagus of the patient, which will result in food retention above the patient and obvious dilatation of the esophagus, thus causing the patient to vomit.