The vomiting of menstrual pain is considered to be caused by the stimulation of menstrual pain. The increase of prostaglandins in the body after the onset of menstruation can easily stimulate the contraction of the uterus causing pain. The prostaglandins enter the blood circulation and also cause gastrointestinal discomfort, easily causing nausea, vomiting, diarrhea, dizziness, general weakness and other symptoms, and when the pain is severe it can also cause sweating and pallor. In the menstrual period pain is serious will affect the appetite, if you eat hard, indigestible food will cause indigestion will also cause vomiting phenomenon, stomach disease is easy to cause stomach pain, nausea. Therefore, the phenomenon of vomiting needs to be observed for specific reasons, and then reasonably adjusted for the specific situation. If you have menstrual cramps, you need to be examined promptly to rule out adenomyosis and other diseases, and if you have primary cramps, you need to take ibuprofen for pain relief.