Farting is also known as anal defecation. It is normal for a person to have anal defecation 10 to 20 times a day, totaling about 500-1500ml. Normally, the gas produced in the intestines is expelled through the anus after peristalsis. Eating different foods and exercising differently will have an effect on the amount and frequency of anal excretion. A normal person farts about 10 to 20 times a day, totaling about 500-1500 ml. Any amount of gas within this range is normal and nothing to worry about. If you have too much gas, you should consider eating too much root vegetables, soy products and starchy food; if you have no gas for a long time, you should exclude whether you have intestinal obstruction and other intestinal diseases. If there is excessive anal exhaust or no exhaust, you should go to the hospital in time to avoid delaying your condition.