If the patient has endometrial polyps, which are very small and have a very thin tip, they can be eliminated during menstruation as the lining of the uterus peels away. Generally, on the third day of a woman’s menstrual period, when the bleeding is at its peak, large pieces of endometrial lining are stripped off, and the endometrial lining may contain small endometrial polyps, so this situation can occur. However, on the third day of menstruation, the presence of fleshy tissue in the vaginal blood does not necessarily mean that it is an endometrial polyp, but may simply be endometrial. If you want to determine whether the fleshy tissue discharged on the third day of menstruation is a polyp or not, the discharged tissue must be sent to the pathological examination to be able to make a clear diagnosis, and it is difficult to make a judgment simply by the naked eye to observe.