There are more reasons for vomiting during menstruation, which are related to dysmenorrhea, improper diet during menstruation or gastroenteritis, and may also be related to menstrual syndrome. 1. Dysmenorrhea: The increased secretion of prostaglandins during menstruation can further cause dysmenorrhea, and some people have a low tolerance for pain, which can cause nausea and vomiting. 2. Improper diet or gastroenteritis during menstruation: Improper diet during menstruation and eating unclean food may cause gastroenteritis, which may lead to vomiting. 3. Menstrual syndrome: The increased prostaglandins during menstruation can not only stimulate uterine contractions and cause dysmenorrhea, but also stimulate the gastrointestinal tract and cause vomiting. Therefore, if you experience vomiting during menstruation, it is recommended that you consult a doctor in a timely manner, complete the relevant examinations, and under the guidance of the doctor to clarify the specific causes of the disease and provide targeted treatment.