After pregnancy, as the pregnant woman’s uterus will have growing pains, sensitive people may occasionally have pain in the abdomen. If a pregnant woman has pain in the lower left corner of her abdomen, persistent and getting heavier, she should also be careful of the following common causes: 1. Ectopic pregnancy: If you have pain in the lower left abdomen in early pregnancy, you need to diagnose whether it is an intrauterine pregnancy or ectopic pregnancy through ultrasound examination. Sudden onset of severe pain in the left lower abdomen, accompanied by vaginal bleeding, is mostly considered due to ectopic pregnancy in the left fallopian tube, rupture, miscarriage and abdominal pain symptoms; 2, pre-eclampsia: early pregnancy, paroxysmal pain in the left lower abdomen, and has a tendency to gradually increase, accompanied by abnormal bleeding in the vagina, may be a manifestation of pre-eclampsia; 3, intestinal inflammation: pregnant women have relatively poor gastrointestinal function. Bacterial or viral infection may cause cramp-like pain in the left lower abdomen; 4, ureteral stones: severe pain in the left lower abdomen of pregnant women, accompanied by pain in the lower back and radiating pain in the vulva, sometimes also due to ureteral stones caused by spasmodic pain in the ureter; 5, adnexal inflammation: such as chronic adnexitis, adnexal cysts and other diseases before pregnancy, can cause pain symptoms after pregnancy.