Hello,
The various possibilities which present with such pain in the lower left abdomen are diverticulitis, Crohn’s disease, bowel obstruction, ovarian cysts and pelvic inflammatory disease, irritable bowel syndrome , kidney obstruction or pyelonephritis, psoas abscess , hernia and volvolus (twisting
of the sigmoid part
of the large
bowel on itself).
Investigations like ultrasound abdomen, CT abdomen and colonoscopy are required to confirm a diagnosis.