It is very likely that this blood cannot be discharged outside the uterus because of poor uterine regeneration, and it accumulates inside the uterus, so discharging the blood is a good thing for the uterus to recover. The vast majority of Chinese medicines, such as Wujia Biochemical Capsules, Yimu Cao Capsules, and New Biochemical Capsules, can effectively promote uterine contraction and expel bruises. You can also inject oxytocin intramuscularly once a day, ten units at a time, to promote uterine contraction and expel the blood in the uterine cavity. If the bruise is not treated, it may affect the contraction of the uterus and cause intrauterine infection, so there is no harm in draining the bruise.