After eating birth control pills, there is blood in the leukorrhea, if it is emergency contraceptive pills, this is due to the emergency contraceptive pills contain estrogen-progestin components, the endometrium is affected by estrogen-progestin. When the drug is gradually metabolized, the endometrium will appear a little peeling, bleeding is normal, this is the drug withdrawal bleeding, do not need to deal with, 1 week or so time blood will gradually reduce disappear. If the short-acting contraceptive pill has blood in the leukorrhea, it is possible to miss the dose or not according to the regular oral caused by the need to adjust the time of the drug, it is best to take the oral at the same time every day, the effect is better. Short-acting contraceptives must be used regularly according to the course of treatment, and can not be discontinued privately, otherwise it will cause irregular vaginal bleeding.