There are three sources of fart: (1) When swallowing food, air enters the digestive tract; (2) Gas produced by food bacteria fermentation in the intestine; (3) The gas in the blood permeates into the intestine. About 7~ 10 liter of gas enters the intestine every day, but most of it is absorbed by the blood vessels in the intestinal wall. About 0.5 liters of fart discharged from the intestine is the waste gas discharged from the body, mostly carbon dioxide, hydrogen and methane. Fart is produced because some foods we eat are not decomposed. The undecomposed parts, including fiber and sugar, become food for Escherichia coli. Escherichia coli is discharged after a full meal, and these gases accumulate in the body, causing air pressure. Too much pressure will be pushed out of the body, forming a fart. The amount of fart is related to people's diet. Some people like to eat onions, ginger, raw garlic, potatoes, sweets, beans and pasta. Because these foods contain substrates that can produce a lot of hydrogen, carbon dioxide, hydrogen sulfide and other gases, the exhaust gas often increases greatly after eating, and fart constantly. The amount of fart is also related to the strength of human digestive function. When indigestion occurs, intestinal bacteria ferment rapidly, which is easy to produce gas and make people fart. Investigation shows that a person farts about 14 times a day. Every day, everyone releases about 500 ml of waste gas. Although fart stinks, fart is a normal physiological need and is beneficial to people's health. It is unhealthy for a person not to fart all day. People who don't fart all the year round are most likely to have gastrointestinal problems. A high-protein diet will produce a lot of hydrogen sulfide (the smell of rotten eggs) when it rots, so it has a special smell. Generally, the more fragrant you eat (meat, fried food), the more smelly you fart. If you don't eat well (coarse rice, light rice), the smell will be less. Some people eat too much sweet potatoes, although they will fart, but the taste will not be too bad, because sugar fermentation mainly produces carbon dioxide gas. If you fart too much, and it often smells bad, it means that protein has eaten too much and has a heavy burden on his stomach, so he should immediately reduce the amount or change to a vegetarian diet to prevent gastrointestinal diseases. Flatulence is generally a certain amount of gas in the intestine. Sometimes it secretly "blows in the wind" from the bottom of the intestine, which is also called "fart" or rises to the stomach to suffocate. A surprising research data: the number of times a healthy person with a normal diet exhausts from the rectum is 10- 18 times a day! And people who exhaust too much: 140 times a day! Causes of intestinal gas: 1) Swallowing air In most cases, the reason for excessive intestinal gas is that you swallow a lot of air or the bacteria in the intestine produce too much gas. As far as the former is concerned, everyone will swallow some air when eating, but nervous people will gulp in air. However, when people are calm or relaxed, they may inhale too much air. For example, if false teeth are not properly worn, saliva will secrete more air, so the air will be swallowed with saliva. When they feel sick, they often swallow saliva, which will make a lot of air enter their stomachs. In addition, drinking drinks through straws, chewing gum, sucking candy, smoking, drinking carbonated drinks to quench thirst, or taking baking soda to treat indigestion will also increase the gas content in the intestine. 2) Food causes excessive intestinal gas. If it is not caused by swallowing air, it is probably because Chinese cabbage, cauliflower, baked beans (the more you eat, the louder your fart), peas, Brussels sprouts, peaches, apples, melons, onions and other foods are fermented after being treated by normal bacteria in the intestine. In addition, excessive intestinal gas may also be due to a sudden increase in a large number of insoluble fibers such as wheat bran in the diet. If the absorption of wheat bran is not gradually increased, the intestinal tract will react badly and form a lot of gas. 3) Intestinal disorders, the most important of which are intestinal allergy or spasm [see "intestinal allergy syndrome"], gallbladder disease [possibly indigestion caused by eating fat], and insufficient lactose absorption capacity in the body. The last item refers to the lack of lactose (unitary) necessary for human body to digest lactose (sugar existing in milk and dairy products), and indigestible sugar is fermented by bacteria to produce flatulence. Why do people fart? Because the intestine has been crawling, as long as the peristalsis exists, gas will be discharged from the anus and fart. The amount of fart is related to people's food composition and cooking habits. Some people like to eat raw onions, onions, ginger, raw garlic, potatoes, sweets, bean products and pasta. Because these foods contain substrates that can produce a lot of hydrogen, carbon dioxide, hydrogen sulfide and other gases, they tend to be manic and fart after eating. The amount of fart is also related to the strength of human digestive function. When indigestion occurs, intestinal bacteria ferment rapidly, which is easy to produce gas and make people fart. A normal person farts 5- 10 times a day, and the total gas volume will be about 500 ml. Generally speaking, the more fragrant you eat (such as meat and various fried foods), the more smelly your fart will be. Why is there gas in the digestive tract? This is because when people eat food, due to the role of normal flora in the digestive tract, they will produce more gas. These gases move downward with the peristalsis of the intestine and are discharged from the anus. When it is discharged, due to the action of anal sphincter, noise sometimes occurs. Therefore, farting is a manifestation of the normal operation of the intestine. On the contrary, if you don't fart, or fart too much and stink, that's an abnormal phenomenon. 1. Farting increases. Sometimes farting too much is related to eating too many starchy foods, such as sweets, sweet potatoes and potatoes sold in the market. People who eat more pasta fart more, which makes the intestinal cavity produce too much gas, resulting in more fart and more feces. At this time, we should reduce starchy foods and increase protein and vegetable foods to achieve a balanced diet. 2. Farting stinks. Farting in front of people is the most indecent. There are two kinds of stinky farts. First, the stool is thin, and the fart shit released has a strong smell. When the stool is discharged, the fart will not be put. From this point of view, "Fart is shit head" makes sense. Second, the fart smell is particularly strong and stinks like rotten eggs. This is due to eating too much protein food, resulting in food stuck in the intestine. After the food in protein is decomposed in the digestive tract, amines are produced, and amines have this odor. The solution is to reduce the amount of food, especially food containing protein. If you don't fart for a long time, the problem will be serious. Newborns don't fart, so we should check whether it is anorectal or anal hypoplasia. Adults don't fart, and the abdomen bulges like a drum, indicating abdominal flatulence. It is necessary to consider whether there are problems in the anus and rectum, such as inflammation, tumor, constipation, hemorrhoids and so on. If necessary, intubate and exhaust the anus. Suffering from intussusception, volvulus and intestinal obstruction, I have no fart because my fart is blocked by my intestines. If you don't fart and have severe colic, you must go to the hospital as an emergency. In addition, peritonitis caused by gastric perforation and appendicitis can harden the abdomen, cause severe pain, and also can not fart.