Before menstruation, most women generally do not have any special performance, but a small number of women may have mood changes or body swelling and discomfort. 1. Emotional changes: generally in the week before menstruation, due to the secretion of prostaglandins, may cause some patients nervousness and insomnia, mental depression, lack of concentration and so on. 2. Physical discomfort: some women may also experience back pain, aching legs and feet, and some are accompanied by diarrhea, breast tenderness and other phenomena. The above symptoms can be collectively called premenstrual syndrome. Women can alleviate it through some measures, such as soaking feet in hot water before bedtime to promote blood circulation, actively exercising to enhance physical fitness, distraction, maintain a good mood, pay attention to the nutritional balance of the diet.