Long-term use of birth control pills may result in menstrual disorders, discoloration, and weight gain, and can increase the risk of uterine fibroids and blood clots. There are long-acting and short-acting contraceptives, as well as emergency contraceptives. Short-acting contraceptives are combined estrogen-progestin preparations, which are now more commonly used as a contraceptive. Short-acting contraceptive pills can cause menstruation in a week or so after stopping the pill, and you can get pregnant in a month after stopping the pill, so the side effects are relatively small. However, if taken for a long period of time, there are side effects, such as it can lead to weight gain, discoloration, increased risk of uterine fibroids and thrombophilia in women. Emergency contraceptive pills cannot be used as a regular method of contraception, and their hormonal content is more harmful when taken for a long period of time. It can lead to irregular menstruation, menstrual disorders, and may seriously lead to amenorrhea. Long-acting contraceptive pills, usually once a month can be taken, long-term use of the harm is mainly affected by menstruation. Please follow your doctor’s advice when choosing and taking birth control pills, and do not use them blindly on your own.