If vomiting and diarrhea often occur during menstruation, it is considered to be due to menstrual syndrome. If it occurs occasionally, it may be related to improper diet as well as factors such as being cold or chilled, and the specific causes are as follows: 1. In the pre-menstrual period, estrogen in the body reaches a higher level, and the estrogen level drops abruptly after the menstrual period. Due to too much fluctuation in estrogen, sensitive women are prone to menstrual syndromes, such as headache, dizziness, nervousness, weakness, insomnia, and gastrointestinal dysfunction symptoms, including nausea , vomiting, and abdominal pain. With the end of menstruation, the symptoms will be relieved. 2. During menstruation, due to the relatively low immunity and weak gastrointestinal function, gastrointestinal dysfunction may be caused if you have eaten food that is difficult to digest or unhygienic, as well as cold and irritating food, and if you have been exposed to cold and chills in the lower abdomen. When the above symptoms occur, it is advisable to go to the hospital in time.