Before menstruation, there is usually no increase in leucorrhea because the estrogen level in the body is at its lowest at this time, and the relative secretion of cervical canal secretions as well as vaginal secretions is reduced. The leukorrhea will increase when you are in ovulation, mainly due to the regulation of hormones in your body. Before menstruation, you may experience dizziness, headache, nausea, vomiting, chest pain and abdominal pain, etc. The symptoms may be relieved gradually with the onset of menstruation. Before menstruation, you need to take rest and avoid staying up late to prevent delayed menstruation or discomfort during menstruation. Before and after menstruation, you need to pay attention to eat as little cold and stimulating food as possible to avoid discomfort, and pay attention to a reasonable diet, which has a great role in maintaining the menstrual cycle.