There are many digestive tract diseases, but they are often easily overlooked because the symptoms are not obvious. Therefore, you should learn to self-examine from some inconspicuous symptoms after meals, and find early diagnosis and treatment early. 1. Those who have obstruction, pause and pain behind the sternum when eating, and it is light and heavy at times. This often suggests that the patient may have esophagitis, esophageal diverticulum or early esophageal cancer. 2.Satiety after meals or fullness all day long, belching but not acid reflux, poor appetite, gradual weight loss, mild pallor or graying, middle-aged and elderly people should consider chronic gastritis, gastric cancer, especially chronic atrophic gastritis and gastric prolapse. 3. Pain in the upper abdomen after meals, or a sense of nausea, vomiting, or accumulation of food. The symptoms persist for many years, and often come on in autumn. The pain may be rhythmic, such as induced by cold, anger, or after eating irritating food, which may be gastric ulcer. 4. Often stomach pain 2 hours after meal, or waking up with pain in the middle of the night, which can be relieved after eating, often with acid reflux. There may be duodenal ulcer or inflammation. 5.After meal, abdominal distension and pain, often nausea, vomiting, occasionally vomiting blood, with past history of gastric disease recently aggravated, or no past history of gastric disease only recently discovered, and accompanied by anemia, emaciation, not thinking about eating and drinking, hard lumps felt at the umbilicus or heart, then stomach cancer is considered. 6.Abdominal pain and diarrhea occurring after improper eating or cold, which may be accompanied by vomiting, chill and fever, may be acute gastroenteritis or acute dysentery. 7.Immediate diarrhea after meal, diarrhea once a meal, slightly cold or improper eating, sometimes diarrhea and sometimes constipation, diarrhea is watery, more mucus when constipated, sometimes bloating with the intention of stool and no stool in the toilet, several years did not see the loss of weight, then consider the irritable bowel syndrome.