Women with vague pain and anal swelling in the lower left abdomen should consider inflammation in the pelvis on the one hand, and pregnancy-related diseases on the other, because there are fallopian tubes and ovaries in the lower left abdomen, and vague pain in the lower left abdomen can occur if inflammation is detected. If a woman has fluid in the pelvis, there will be a feeling of anal swelling, so when there is pelvic inflammatory disease, there will also be vague pain in the lower left abdomen and anal swelling. But at this time it also depends on the woman’s menstruation. If there is a delay in menstruation with vague pain in the lower left abdomen and anal swelling, be alert to the occurrence of ectopic pregnancy on the left side because when there is ectopic pregnancy on the left side the fertilized egg is planted in the left fallopian tube and thus there is swelling and pain in the lower left abdomen. If there is pelvic bleeding, there will be anal swelling, so if you find vague pain in the lower left abdomen and anal swelling, you should have a urine test to rule out pregnancy.