There are many types of digestive tract diseases, which are often overlooked due to atypical symptoms. Among some symptoms that are not obvious after meals, pay attention to the experience, self-examination and early detection of gastrointestinal diseases in order to get timely treatment. 1.Sometimes there is obstruction, stopping, painful feeling behind the sternum, and it is light and heavy at times. This often suggests that one may suffer from esophagitis, esophageal diverticulum or early stage of esophageal cancer. 2.Fullness after meals or fullness all day, belching but not acid reflux, poor appetite, gradual weight loss, and mild pallor or graying. In this case, chronic gastritis, especially chronic atrophic gastritis and gastric prolapse should be considered. 3, pain in the upper and middle abdomen after meals, or nausea, vomiting, feeling of food accumulation, the disease may have been long; the pain is regular, such as cold, anger, after eating irritating food attack. This condition may be a gastric ulcer. 4. Stomach pain often occurs about 2 hours after meals, even waking up in the middle of the night with pain, which can be relieved by eating something, often with acid reflux. It is easy to attack in autumn and winter, and the pain is on the right side of the upper abdomen, with a rhythm. Such cases may suffer from duodenal ulcer or duodenal inflammation. 5, abdominal distension and pain after meals, often nausea, vomiting, occasionally vomiting blood, past history of gastric disease recently aggravated, or no gastric disease in the past only recently, and accompanied by anemia, wasting, not thinking about eating, and hard lumps are felt in the umbilicus or heart. This situation should be highly alert because it may be stomach cancer. 6. Abdominal pain and diarrhea occur after improper diet or cold, which may be accompanied by vomiting, chill and fever. This may be acute gastroenteritis or acute dysentery. 7, diarrhea immediately after meals, eating a meal diarrhea once, a little cold or improper diet onset. There may also be diarrhea and constipation, diarrhea is watery, constipation is more mucus, sometimes bloating with the intention of stool and no stool to the toilet, several years without losing weight. This symptom is more likely to be caused by allergic enteritis.