It is normal to fart 5 to 15 times a day and to have a volume of gas around 500ml. Farting is medically known as flatulence, which is the result of intestinal peristalsis and the decomposition of intestinal flora to produce gas. The number of farts is related to the type of food, intestinal motility and digestion. 1. Excessive intake of food rich in fat, protein, etc. is likely to produce gas. The reason for this is that the fat and protein in the food residue are broken down by the colonic bacteria to produce carbon dioxide, ammonia, and other gases that are expelled from the body. 2. When intestinal peristalsis is accelerated, the amount of flatulence increases. Therefore, when diarrhea occurs due to acute gastroenteritis or other diseases, intestinal peristalsis increases along with the increase in exhaust gas. 3. Slow peristalsis and insufficient power of the intestinal tract will result in less gas. For example, after colonoscopy or abdominal surgery, it may lead to transient intestinal paralysis, resulting in a temporary cessation of exhaust. Generally speaking, the amount of exhaust is not the main clinical symptom, but should be analyzed in combination with bowel movement, diet and so on.