Farting is also known as anal exhaust, the main reasons for anal exhaust odor are dietary reasons and intestinal diseases, through changing dietary habits, as well as medication and other ways to improve the symptoms of anal exhaust odor. 1. Dietary reasons: when the diet is greasy or the food contains more proteins, the food is not easy to be digested and accumulate in the intestines, which can lead to smelly exhaust. By reducing the intake of foods containing more protein such as lean meat, eggs, dairy products and other greasy foods, the symptoms of foul-smelling gas can be relieved. 2. Disease causes: Constipation, lactose intolerance, intestinal flora imbalance and other diseases can lead to smelly gas. (1) Constipation: To relieve constipation, you can drink more water, eat more vegetables and fruits, and if dietary adjustments are not effective, you can take lactulose and other medications to improve constipation, thus improving the symptoms of constipation resulting in foul-smelling gas. (2) Lactose intolerance: Lactose intolerance can be improved by reducing the consumption of milk, margarine and other foods with high lactose content, as well as taking probiotics, lactase and other medications, which can further improve the odor of exhaust gas caused by lactose intolerance. (3) Imbalance of intestinal flora: Reducing the use of unnecessary antibiotics and applying probiotics such as bifidobacteria can improve the situation. There are many other causes of smelly exhaust, if it can not be improved through dietary adjustments, you need to go to the hospital in time for a relevant examination to determine the cause of the standardized treatment, so as not to delay the condition.