Eating Colla Corii Asini will not make menstruation earlier, Colla Corii Asini itself has the effect of tonifying blood, and has the effect of stopping bleeding, for women’s qi and blood deficiency will play a very good nourishing effect, so eating Colla Corii Asini will not make menstruation earlier in the course of eating Colla Corii Asini. There are some reasons for early menstruation, such as progesterone deficiency leading to early atrophy of the corpus luteum and early menstruation, in addition to uterine fibroids, endometrial polyps, endometrial inflammation may lead to early menstruation, it is recommended that the best to find out the reasons for the cause, such as blood tests for the sex hormone six, coagulation, ultrasound, gynecological examination, etc., to understand the reasons for the treatment given will improve the symptoms of early menstruation. The symptoms of early menstruation will be improved if treatment is given after the cause is known.