Incomplete medication abortion, residue in the uterine cavity, poor contraction of the uterus after medication abortion, inflammation, etc. can lead to abnormal vaginal bleeding after medication abortion, such as vaginal bleeding for a long time. The 20 days of medical abortion and a small amount of brown blood, considering the possibility of the above three conditions, need routine gynecological examination, to understand the brown discharge has no odor, the uterus and the double adnexal area has no pressure and pain. Through the initial review can be clear whether there is no inflammation, at the same time need ultrasound examination, to understand the pelvic uterus recovery. If there is a small amount of residue or no residue in the uterine cavity, oral antimicrobials can be taken to prevent infection. Oral contraction drugs to promote uterine contraction, after treatment will be significantly improved, pay attention to observe the next menstrual situation.