Flatulence is mainly caused by dietary factors, gastrointestinal diseases and mental factors. 1. Dietary factors: bad eating habits such as talking during meals and wolfing down food may lead to flatulence by swallowing too much gas, and the symptoms of flatulence may be triggered by consuming too much gas-producing food such as corn, sweet potatoes and soybeans. 2. Gastrointestinal diseases: they can be caused by gastrointestinal diseases such as reflux esophagitis, chronic gastritis, peptic ulcer, functional dyspepsia, etc., and can be accompanied by belching (hiccups), regurgitation of acid, nausea, discomfort in the upper and middle abdominal area, burning pain and other symptoms. 3. Mental factors: such as mental tension, anxiety, psychological pressure, etc., can also induce the discomfort of flatulence. If the symptoms of flatulence persist without relief or are accompanied by other discomforts, you should consult a doctor in time to clarify the diagnosis of the disease, and if necessary, carry out appropriate treatment.