The symptoms of nausea, vomiting and dizziness in women before menstruation may be caused by the following factors: 1, there may be water and sodium retention in the body before menstruation, affecting the normal gastrointestinal function, so there will be nausea, vomiting and dizziness, patients can adopt the way of eating less and more meals to relieve the symptoms, in the diet should also eat more light, easy to digest food, avoid eating greasy and 2, with mental factors, if women in the pre-menstrual period appear highly nervous or anxious, too much pressure, will also appear nausea, vomiting symptoms, this situation patients need to release the pressure, you can go outdoors to breathe more fresh air, more deep breathing, maintain a good state of mind, and ensure sufficient sleep to relieve symptoms.