Stomach discomfort may be caused by gastritis, Helicobacter pylori infection, and gastric acid secretion imbalance. 1. Gastritis: It is divided into acute, chronic and special type of gastritis, which is induced by irritating diet, overeating, nervous tension and other factors, and clinically manifested as bloating, vomiting, stomach pain and discomfort. 2. Helicobacter pylori infection: Helicobacter pylori infection causes chronic gastritis and peptic ulcer, etc. Early there are no obvious symptoms, and with the development of the disease, acid reflux, nausea in the morning, stomach discomfort and so on will gradually appear. 3. Stomach acid secretion imbalance: Diet too spicy, sweet and sour, greasy, as well as suffering from gastrointestinal diseases, will lead to an imbalance in the secretion of gastric acid, which will cause damage to the mucosa of the upper gastrointestinal tract and lead to stomach discomfort. If you can not determine the cause, or the symptoms have not been relieved, you should seek medical attention, avoid self-medication, so as not to delay the condition.