In Guangdong, the eastern part of Guangdong is a high incidence area for esophageal cancer, which is not only related to genetics but also has a lot to do with dietary habits. People in the eastern part of Guangdong, including Chaoshan and Hakka, like to drink hot kung fu tea and eat pickled vegetables, kimchi, pickles, fish, shrimp paste and so on. All these diets can easily induce esophageal cancer. Generally speaking, the mucous membrane of the mouth, esophagus and stomach can only tolerate a temperature of 50°C. The temperature of hot soup, kung fu tea and hot pot is much higher than the tolerable temperature, which can easily scald the mucous membrane. Eating coarse and hard food, eating too fast can easily cause mechanical damage to the esophageal mucosa. Chronic damage to the mucosa can cause chronic inflammation of the esophagus, which can easily lead to cancer. Not paying attention to oral and dental hygiene can also easily cause chronic esophagitis, which in turn induces esophageal cancer. The content of nitrosamines in food and drinking water is high in areas with high incidence of esophageal cancer. Nitrosamines are carcinogens, and eating foods or drinking water with high nitrosamines content can easily induce esophageal cancer, as well as stomach cancer. Pickles, kimchi, pickles, fish, shrimp paste and other foods are easily moldy, and eating moldy foods is associated with the occurrence of esophageal cancer, which has also been confirmed in animal experiments. And such mold and nitrosamines have synergistic carcinogenic effects. There is a consensus that smoking is associated with cancer in lung cancer. In fact, smoking is associated with the development of many types of cancer, including esophageal cancer. If smokers drink alcohol at the same time, besides alcohol will stimulate the esophageal mucosa, alcohol will promote the absorption of harmful substances in the smoke, which will also promote cancer. Thus, the main thing to prevent esophageal cancer is to control “mouth”. To change bad eating habits, protect oral health, and quit smoking and drinking at the same time. For those who have family history or long-term poor dietary habits and other high-risk factors, they should pay attention to physical examination or consult a specialist.