Vaginal bleeding 20 days after abortion is not normal. It is recommended to pay attention to the cleanliness and hygiene of the vulva, change underwear and panties frequently, do not wear tight clothes and pants, and prohibit spicy and stimulating food. Go to the hospital as soon as possible, check the gynecological ultrasound as well as draw blood to check the blood HCG value. If the gynecological ultrasound does not find any residual pregnancy tissue in the uterine cavity and the blood HCG value is not high, you can take oral motherwort and new biochemical granules in this case. If the gynecological ultrasound suggests that there is residual pregnancy tissue in the uterine cavity, in this case, you need to further purify the uterus or hysteroscopy plus purging surgery. After the operation, please note that it is forbidden to take a bath and have sex for 1 month, pay attention to rest, avoid strenuous exercise, and generally one week after the outpatient review.