Two-year-old female baby bleeding from the lower body is a variety of reasons: the first, is caused by baby bump, baby accidentally bumped when playing, the vulva bleeding situation, this situation is not too worried, to do a good job of cleaning the baby, do not let the baby’s lower body cover, keep dry. The second, may be the baby in the process of playing caused by the rupture of the hymen, thus resulting in the baby’s lower body bleeding. The third, may be because the baby’s body has inflammation caused by the lower body bleeding. The fourth kind, may be the baby precocious menstruation. Parents must pay more attention to the baby’s changes in the process of growth, always pay attention to the baby’s mental state, no matter which situation occurs, it is recommended that parents take their children to the hospital to do some necessary tests, and then according to the results of the examination to follow medical advice.