Obstructive sensation or dull pain behind the sternum when swallowing dry food is one of the early and middle stage manifestations of esophageal cancer. The main symptom is progressive dysphagia. In the early stage, there may be only discomfort or blockage when swallowing, pain behind the sternum or discomfort behind the sternum when swallowing food. Preventive measures for obstruction or dull pain behind sternum when swallowing dry food: 1. Reasonable nutrition (1) Malnutrition is related to esophageal cancer. Lack of protein will lead to mucosal hyperplasia of esophagus, which will easily become malignant; lack of fat will hinder the absorption of essential fatty acids and fat-soluble vitamins, which will affect health and lower immune function. (2) To eat more fresh vegetables and fruits, the former cannot replace the latter, because cooking often destroys a lot of vitamins and trace elements. (3) to promote the drinking of tea, green tea can prevent cancer, and cardiovascular disease and other benefits. However, it is not advocated to drink, it is best to “taste”, to drink a small amount of effective multiple times. 2.Reject cancer-causing food (1) Nitrosamines are closely related to esophageal cancer, and mold can enhance the carcinogenic effect of nitrosamines. Overnight vegetables, rotten fruits, moldy grains, salted fish and pickles, and fried, fried and baked foods should be prohibited. (2) Do not drink alcohol. It is inevitable that carcinogens will be consumed if you drink a lot of alcohol for a long time. Some wine contains carcinogens such as nitrosamines and aflatoxins, as well as indirect carcinogens such as aldehydes and alcohols. (3) Do not smoke. Smoking has a wide range of carcinogens, which can cause cancers of the digestive, respiratory and urinary tracts. 3, try to eat less hot food such as hot pot Generally speaking, the mouth, esophagus and stomach mucosa can only tolerate a temperature of 50 ℃, while the temperature of hot pot soup can be as high as 120 ℃, if eaten immediately, easy to scald the mouth, tongue, esophagus and stomach mucosa. If the mucosa of the esophagus and other parts are often damaged, it is easy to induce esophageal carcinoma. Warm Tips: Generally speaking, some esophageal cancers can be detected early and can be cured completely, so when you have symptoms of dysphagia or foreign body sensation, you should have relevant examination in time and then targeted treatment to prevent malignant transformation, which can cause great harm.