Premenstrual syndrome is mainly related to changes in hormone levels in the body before menstruation, and can also be called premenstrual syndrome, the manifestations of premenstrual syndrome are mainly depression, poor mood, chest pain, chest distension, generally manifested as paroxysmal pain, sometimes accompanied by lower abdominal cramps, bad temper, easy to get excited, and even face acne, generally do not need to worry about special, after the end of the period These symptoms will gradually disappear. You should pay attention to rest, develop good habits, change your underwear and underwear regularly to reduce the occurrence of gynecological inflammation, relax and participate in outdoor activities. If your period lasts for more than 40 days, you should be alert to the possibility of menstrual disorders and receive treatment in time.