Inverted lower body exhaust, may be physiological factors such as the impact of gravity, vaginal laxity and other causes, but also may be pathologic factors such as peptic ulcer, intestinal dysbiosis and other diseases lead to. 1. Physiological factors (1) The effect of gravity: when inverted by gravity, the organs fall down, the gas floats above, and the abdominal muscles are tense, the pressure in the abdominal cavity increases, squeezing the intestines to promote intestinal peristalsis, and the anal exhaust increases. (2) vaginal laxity: women with vaginal laxity, the front and back walls of the vagina can not be tightly adhered to, resulting in gas entry, inversion of the gas is easy to be discharged through the vagina, that is, the lower body exhaust. 2. Pathological factors (1) Peptic ulcer: cause gastrointestinal dysfunction, resulting in indigestion, food residue in the intestines, decomposition produces more gas, easy to float above when inverted through the anus to be discharged. (2) Intestinal dysbiosis: drugs, improper diet or inflammatory bowel disease lead to intestinal dysbiosis, intestinal bacteria produce more gas, and a large amount of gas will be discharged through the anus when inverted. Pathological factors lead to inversion of the lower body exhaust should pay attention to, need to consult a doctor in time to treat the primary disease. In addition, you should pay attention to develop good dietary habits, moderate consumption of vegetables, fruits and other foods that help intestinal peristalsis, to promote the exhaust.