Progressive dysphagia, a typical clinical manifestation of esophageal cancer, is also well known; the so-called progressive dysphagia is that the difficulty in eating is light at the beginning, which is only felt when eating dry and hard food; then there is difficulty in eating ordinary diet, and later there is also difficulty in eating semi-liquid diet, and finally it is difficult to swallow even water and saliva, and water and bubbles keep overflowing from the mouth. The pain was so great that it could be imagined. However, it may be too late to go to hospital for examination and treatment if all these manifestations are esophageal cancer. Early detection, early diagnosis and early treatment are emphasized in all diseases and pains, and this is especially true for esophageal cancer. This is because, on the one hand, well chewed food can pass through the lumen of 0.5 cm in diameter, and once there is difficulty in swallowing, it means that the lumen of esophagus is obviously narrowed; on the other hand, the surgical resection rate of early stage esophageal cancer reaches 100%, while the surgical resection rate of middle and late stage is extremely low, less than 3%. Literature confirms that the natural course of esophageal cancer is only about 1 year since the emergence of dysphagia, while the survival period is more than 4 years since the early stage of esophageal cancer; with the surgical resection of early stage esophageal cancer, together with radiotherapy and Chinese medicine, many patients can survive as normal people. It can be seen that the key lies in how to detect early esophageal cancer, summarize the signs and symptoms of early esophageal cancer, vigorously carry out popular science propaganda, improve the public’s awareness of this disease, and promote early detection and early diagnosis. At present, it is found that the early stage of esophageal cancer may have no obvious symptoms or manifest as follows: 1. slight or occasional choking sensation under food; 2. pins and needles, burning or friction-like pain behind the sternum and heart fossa when eating; 3. foreign body sensation in the esophagus unrelated to eating; 4. dryness in the pharynx and tightness in the neck; 5. food stagnation in a certain part of the esophagus during eating; 6. stuffy and uncomfortable feeling behind the sternum. The above discomfort can exist alone, or several kinds of coexist; it can persist or occur intermittently.