The emergency contraceptive pill is a highly effective progestin, which can cause swelling and pain in the breast after taking it. In this case, it is recommended to use hot compresses to relieve the local pain, mainly to promote local blood circulation, and the painful symptoms will be reduced. It is also advisable not to take the emergency contraceptive pill except as a last resort. The emergency contraceptive pill can cause abnormal thickening of the endometrium, which may result in irregular vaginal bleeding or withdrawal bleeding. The contraceptive mechanism of the emergency contraceptive pill can also cause the ovaries to suppress ovulation, breaking the ovaries’ original natural ovulation pattern, which may cause menstrual disorders. So it is best to use condoms to prevent pregnancy, which is safe and hygienic, and the contraceptive effect is good.