Improper diet, indigestion, chronic gastritis, and gastric ulcer are the causes of excessive outgassing. Eating too much gas-prone food, such as onions, potatoes, groundnuts and beans, which are difficult to digest in the stomach, can easily produce gas. Talking too much and laughing during meals and inhaling too much air can easily cause gas in the stomach to be expelled from the anus. Patients with dyspepsia have difficulty digesting the food they ingest due to lack of digestive juice secretion, too slow gastric peristalsis, and insufficient gastric power, and the food takes too long to process in the intestines, causing gastric ulcers, which can produce a large amount of gas gathering in the stomach and thus discharging from the anus leading to more exhaust. Patients with gastritis have difficulty digesting food due to inflammatory stimulation of the gastric mucosa and decreased digestive function, and fermentation of food in the stomach can lead to bloating and gas discharge from the anus. In patients with gastric ulcer, due to damage to the gastric mucosa, excessive secretion of gastric acid can cause bloating and excessive exhaust.