The constant gas during menstruation is caused by prostaglandins that irritate the intestinal tract and is also associated with eating gas-producing foods. Prostaglandins are released during menstruation, which not only causes menstrual cramps, but also stimulates the intestinal system. The intestinal system is stimulated by prostaglandins and the peristaltic rate increases and the intestinal flora becomes unbalanced, resulting in a large amount of gas in the intestines and increased exhaustion. Some women often eat soy foods and milk during menstruation to replenish their estrogen and protein needs, but these two foods produce a lot of gas during digestion. When too much gas accumulates in the intestinal tract, it is released in the form of gas, and the symptoms disappear when the intake of these foods is stopped or the food is metabolized by the body.