What is a fart? A fart is a mixture of gases. It is estimated that there are more than 400 chemical components in a fart, including about 59% nitrogen, 21% hydrogen, 9% carbon dioxide, 7% methane, 4% oxygen and less than 1% other trace substances. When these gases pass through the anus, if the pressure is high, it triggers the anal sphincter to vibrate and produce a loud sound, while when the pressure is low, there is no sound. The gas in the digestive tract is expelled upward in the form of burping and belching, and downward is farting, which is one of the most important ways to expel gas from the abdomen. People from birth to death, without exception, have to fart, farts for the “grains of gas”, with the first cry of a newborn baby, the air into the gastrointestinal, gas in the digestive tract constantly into the output, and constantly outward emissions. A normal person farts 8-20 times a day and emits more than 500ml of gas. Where do farts come from? 1.The air we swallow, when swallowing actions such as drinking and eating, especially when eating quickly, chewing gum, smoking, drinking carbonated drinks, and gasping for breath after exercise, foreign air will enter the body, mainly oxygen, nitrogen, carbon dioxide and other gases. If the body lacks certain digestive enzymes, some food cannot be digested and absorbed in the small intestine, such as beans, cabbage, etc. Undigested food enters the large intestine and is decomposed by intestinal bacteria to produce methane, hydrogen, etc. 3, the chemical reaction of the gas in the intestine and blood absorption penetration diffuse into the intestine some gas. Smell farts to know diseases By understanding the sound and smell of farts, we can not only know some signals transmitted by the body, but also some important clues for clinical diagnosis. If farts are loud and smelly, you may have indigestion from eating meat, while if farts are loud and smelly, you may have eaten starchy foods and need to control them. Babies must fart 10 seconds after birth, otherwise they may have intestinal obstruction, intussusception or anal insufficiency; farting 6 to 24 hours after surgery indicates that the intestinal tract has basically recovered and can eat; for patients with long-term constipation or intestinal obstruction, farts are also used as messengers to indicate a good prognosis for the disease. Foul-smelling farts often indicate bacterial infections in the intestinal tract and destruction of the intestinal mucosa by bacterial toxins, and may be accompanied by abdominal pain, urgency, fever, etc. Fishy farts may indicate bleeding in the gastrointestinal tract and the accumulation of blood in the gastrointestinal tract. In addition, when there is a malignant tumor in the intestine, because the cancerous tissue is rotting, flaking and bleeding, coupled with the decomposition and fermentation of bacteria, the farts released will also have a fishy smell; fart with an unbearable odor beware of enteritis and intestinal cancer. If the fart is not caused by eating irritating food such as garlic and onion or consuming too much meat, you must be alert to it. If necessary, laboratory tests of stool and e-colonoscopy are feasible for early detection, early intervention and treatment. It is said that Malawi, an African country, once proposed to make farting in public illegal, but finally failed to implement it due to public pressure. Although farting is unseemly and disgusting, but not to hold it in. China’s folklore has a saying “farts are the gas of life, there is no reason not to put.” Hippocrates, the father of Western medicine, said that “healthy people must exhaust”, can smoothly exhaust to a certain extent reflects the normal gastrointestinal motility. If a fart is not released, the gas is trapped in the intestine, because “this road is not open”, it will be absorbed by the intestinal wall as absorbable material into the blood circulation, increasing the workload of other organs for no reason. In the long run, this may lead to metabolic disorders, intestinal dysfunction and cause a variety of diseases. Thus, we do not need to blame others for farts in our daily life, nor do we need to be overly ashamed of it. Avoid public places as much as possible, eat slowly and chew carefully, balance meat and vegetables, and do not eat too much. Try to eat less gas-prone food, such as peanuts, beans, cabbage, cauliflower, onions, radishes and so on. These can help reduce the odor and the number of farts.