Urine and menstruation do not come out of the same place; menstruation is expelled from the vagina. The urethra is used for urination, and is the tube that leads from the bladder to the outside of the body. For men, the urethra can be used for both urination and spermatogenesis, but for women, the urethra can only be used for urination. Menstruation is discharged through the vagina, which is the channel connecting the uterus and external genitalia, and is a unique female reproductive organ, as well as the female organ of sexual intercourse. The vagina not only discharges menstrual blood, but also serves as a passageway for the delivery of the fetus. In general, the urethra is located in front of the vaginal vestibule and the vagina is located at the back, which can be confusing because of their proximity, but the urethra is not where menstrual discharge occurs. When there is discomfort in the urethra or vagina, you should go to the hospital immediately to avoid delays.