Farting is also very loud but not smelly, considering that it is caused by physiological factors such as eating too many soy products and pathologic factors such as gastritis. 1. Physiological factors. (1) lack of exercise: long-term bedridden, sedentary and other people, due to less activity, resulting in slower peristalsis of the gastrointestinal tract, causing excessive intestinal gas accumulation, farting more and loud and other phenomena. (2) Dietary factors: excessive intake of gas-producing foods within a short period of time, such as soy milk, onions, carrots, cauliflower, taro, etc., which are digested in the intestinal tract and produce gas, and excessive accumulation of gas in the intestinal tract, resulting in farting and loud but not smelly and other symptoms. 2. Pathologic factors: (1) Gastritis, gastric and duodenal ulcer: Helicobacter pylori infection, excessive secretion of gastric acid can cause gastritis, gastric ulcer and other diseases, causing gastrointestinal mucosal congestion, edema and other inflammatory reactions, resulting in decreased digestive capacity, causing acid reflux, belching, nausea, farting and other indigestion symptoms, but also accompanied by abdominal pain, emaciation and other symptoms. (2) Enteritis: Bacteria, viruses, fungi, etc. can cause inflammatory changes in the intestinal mucosa, which can lead to farting, diarrhea, abdominal pain and other symptoms. Total farting is also very loud and not smelly may also be caused by irritable bowel syndrome and other diseases, it is recommended to consult a doctor to clarify the diagnosis, under the guidance of the doctor for targeted treatment.