Causes of early menstruation include uterine fibroids, endometrial polyps, endometrial inflammation, as well as luteal insufficiency and estrogen deficiency, which may lead to the appearance of early menstruation. Pushed back periods are clinically seen in endometrial tuberculosis, polycystic ovary syndrome, and also ovarian function decline, which can lead to pushed back periods. In addition, tension, stress and environmental changes may also cause menstruation to recede. Therefore, it is necessary to go to the hospital for examination when the menstrual cycle is irregular.