Recently, old farts may be caused by dietary factors, but also by intestinal flora imbalance, gastrointestinal dysfunction and other disease factors. 1. Dietary factors: recent large intake of excessive gas-producing foods, such as sweet potatoes, onions, beans, etc., these foods will produce a large amount of gas under the action of intestinal bacteria, and then the old fart. 2. Intestinal flora imbalance: The bacteria in the intestines are divided into three categories, which are probiotics, harmful bacteria and symbiotic bacteria. Harmful bacteria may produce a lot of gas when they decompose food. If the content of probiotics decreases and the content of harmful bacteria increases, it may lead to farting every day. 3. Gastrointestinal dysfunction: prolonged overeating, eating spicy, cold and other irritating foods, and catching cold in the abdomen lead to abnormal peristalsis of the smooth muscle of the gastrointestinal tract, and food stagnation and abnormal fermentation and old farts. It is necessary to change dietary habits and take medicines such as gastrointestinal tablets and domperidone to promote digestion and gastric power. There are many other reasons for farting. If physiological factors are excluded, it is recommended to go to the hospital and ask the doctor to diagnose and treat the problem according to the specific situation.