The symptoms of nausea and regurgitation in the week before menstruation may or may not be related to the onset of menstruation. The causes of nausea and regurgitation are: 1. The symptoms of regurgitation and nausea in the week before menstruation in several consecutive menstrual cycles are a manifestation related to the menstrual cycle, also known as premenstrual tension syndrome. The reason for the occurrence is mainly related to changes in the function of ovarian secretion of estrogen and progesterone, resulting in dysfunction of the vegetative nerves, so pay attention to relaxation, participate in outdoor activities, divert attention, pay attention to rest on time and avoid overexertion. 2. The gastrointestinal symptoms may be caused by gastrointestinal diseases, liver and biliary system diseases or improper diet. Pay attention to proper diet adjustment and take appetizing and antiphlogistic drugs to regulate, and seek medical attention if the effect is not good. If the results are not satisfactory, you should seek medical attention.