Normally if the delivery is vaginal, the bloody discharge will be completely clean within 9 days. If the bloody discharge is intermittent and remains unclean for more than 9 days, it may be caused by the following reasons. First, poor rest and poor uterine regeneration will result in intermittent vaginal bleeding and dribbling, which can be treated with oral delivery granules, and the phenomenon of vaginal menstrual discharge will get better after taking it for about 3-5 days. Secondly, if there is any residue in the uterus, such as placenta residue or fetal membrane residue, it will lead to bloody and incomplete discharge. Third, caused by infection, if there is an infection, it may also be accompanied by lower abdominal pain or the bad smell of the discharge. Once there is an infection, anti-inflammatory treatment should be actively given.