When vomiting occurs in women during menstruation, two main causes are considered: 1. Vomiting associated with menstruation, which occurs cyclically along with the menstrual cycle. This kind of vomiting that occurs with the menstrual cycle is called PMS and is related to luteal atrophy, estrogen and progesterone withdrawal, and fluctuating hormone levels in the body before a woman’s menstruation. It is also associated with a woman’s weaker constitution or with stress and work pressure. When women with dysmenorrhea have more intense pain, painful stimulation can also cause vomiting.2. Vomiting not related to menstruation, women’s body resistance is lower during menstruation, systemic organ function decreases, and gastrointestinal function is easily disrupted during menstruation. Therefore, when the patient does not eat properly, clinical manifestations such as nausea, vomiting or diarrhea may occur.