Abdominal pain after taking the oral emergency contraceptive pill is a normal reaction to the drug. The main function of the pill is to inhibit ovulation and prevent the fertilized egg from being laid, and to make the cervical mucus sticky and prevent the advance of sperm, thus achieving the effect of contraception. The emergency contraceptive pill is used to prevent unwanted pregnancy when no contraceptive measures are taken during intercourse, or when the condom is broken or slipped, or when in vitro ejaculation fails. The adverse effects of taking the pill include withdrawal bleeding, early or late menstruation, nausea, vomiting, abdominal pain, etc. Therefore, abdominal pain after taking the pill is normal. If the pain is not serious, you can give observation, use hot towel to wet compress the small abdomen, drink more warm water or hot drinks, most cases can be relieved. There are a few patients who have abdominal pain caused by pelvic inflammatory disease, gastrointestinal disease or urinary tract stones, so they need to go to the hospital as soon as possible and get the appropriate treatment.