If the menstrual flow is relatively heavy one month after the abortion surgery, it may be caused by the following situations: first, poor recovery of the uterus after the abortion, poor uterine recuperation may cause a decrease in the uterine contraction force, and it cannot stop the bleeding effectively due to the uterine contraction, so it may lead to an increase in menstrual flow. Secondly, the body’s endocrine system may not have fully recovered after the abortion, and it may be due to endocrine disorders that lead to increased bleeding. Thirdly, there may be infection in the uterine cavity after the abortion, usually there will be odor in the vagina, and the secretion or bleeding will also have an odor, which may lead to an increase in the amount of bleeding. If the amount of bleeding is particularly heavy, it is recommended to go to the hospital for review, according to the results of symptomatic treatment.