Taking birth control pills will lead to increased levels of estrogen and progesterone in the body, withdrawal bleeding will occur after stopping the pills, usually in about 2 to 7 days will be good, the specific time varies from person to person. Eating birth control pills will lead to increased levels of estrogen and progesterone in the body, after stopping the hormone levels will drop the withdrawal of bleeding will occur, to be in the body of the contraceptive effect of the pill will pass after the symptoms of vaginal bleeding will gradually disappear, generally in 2 to 7 days or so will be good, the specific time varies, some people metabolism is faster, the recovery time is faster, and some people are slower. It should be noted that birth control pills may cause allergies and other abnormal symptoms, long-term use of birth control pills may lead to irregular menstruation and other conditions, for serious liver and kidney function abnormalities can not take birth control pills. The medication should be used under the guidance of a doctor and should not be used blindly. If any side effects occur after using the pill, consult a doctor promptly to avoid accidents.