What causes severe lower left abdominal pain?

Lots things: Constipation infection inflammation.

Stone/diverticulitis: Here is the list - diverticulitis, kidney stone, hernia, constipation, gas, bladder infection, inflammatory bowel disease, and more... See your physician - they'll get things figured out.

Colon? kidney? gyne?: Diverticulitis commonly causes sharp left lower abdominal pain, inflammatory colitises can cause symptoms. Obstruction. Constipation. Kidney issues. Herniae? Ovarian cysts? You should see a doctor if it has lasted longer than a few days or if it is severe and limiting your daily activities.. There are other causes as well and you may require a ct scan or colonoscopy to help sort them out.