The site of pain in ectopic pregnancy is usually the left and right side of the lower abdomen. Ectopic pregnancy refers to the implantation of a fertilized egg in a location other than the uterine cavity, either in the fallopian tube, in the cervix, in the ovaries or in the abdomen. However, about 90% of ectopic pregnancies occur in the jugular region of the fallopian tubes. Therefore, abdominal pain in the presence of ectopic pregnancy is mostly concentrated on the left and right side of the lower abdomen, where the fallopian tubes are located. In addition to abdominal pain, ectopic pregnancy often manifests as vaginal bleeding and a feeling of anal swelling. If the amount of vaginal bleeding is relatively high, the feeling of anal swelling and the abdominal pain are more serious, you should be alert to the possibility of ectopic pregnancy rupture and bleeding and seek medical attention in time. The most important thing is to observe your menstrual cycle every time you have a period. If you have abnormal bleeding or delayed menstruation, you should be alerted to the possibility of pregnancy and ectopic pregnancy.