Tummy pain after taking birth control pills may be caused by the side effects of birth control pills. As we all know, the pill contains a large number of hormones, including estrogen and progestin, and some women with allergies are prone to stomach pain, nausea, vomiting, dizziness and other uncomfortable symptoms after taking it. It is recommended that you do not eat for two hours before and after taking the pill, and take proper rest, as the symptoms of abdominal pain can be relieved after rest. If the stomach pain does not ease or worsen, you must go to the hospital in time. It is recommended that women choose long-term oral short-acting contraceptive pills, which have a lower hormonal content and fewer adverse reactions, and can regulate the menstrual cycle for women with irregular periods. Try not to choose emergency contraceptive pills because they can cause menstrual disorders, irregular vaginal bleeding and other uncomfortable reactions after taking them.