Pain in the left lower abdomen a few days after intercourse seems to have little to do with intercourse and may be commonly due to the following causes: First, inflammation of the left adnexa, including inflammation of the ovaries, inflammation of the fallopian tubes, and inflammation of the ligaments, can lead to pain in the left lower abdomen. Second, pain may also occur due to the presence of endometriosis lesions in the left lower abdomen. Third, pain in the left lower abdomen due to stones in the left ureter. Therefore, the pain in the left lower abdomen that appears only a few days after intercourse is not related to intercourse. It is recommended to do gynecological examination to exclude inflammation of the adnexa and endometriosis, and it is also recommended to check urinary routine to exclude the possibility of urinary stones.