Menstruation will vomit for the following reasons: 1, because the body’s hormone levels have changed more significantly. Because women in the menstrual period, the endocrine function is more hyper, resulting in the body of estrogen, sex hormones, progesterone and luteinizing hormone, the content of these hormones rise, which produces a certain amount of interference in the digestive system, resulting in vomiting phenomenon. 2, may be due to the neuropsychological factors, part of the women in the menstruation period, will be mentally nervous, anxiety, or even depression, and other adverse emotional reactions These emotional reactions can interfere with the autonomic nerves of the gastrointestinal tract, leading to autonomic dysfunction, which can also cause vomiting and nausea during menstruation.3. Acute infections, such as acute vaginitis, acute pelvic inflammatory disease, acute endometritis, or acute gastrointestinal inflammation, can lead to vomiting in women.