Lower left back pain is muscle, organ, or nerve-related. This article helps you get closer to what’s causing continued pain ...

Diverticulitis occurs when small pouches in the wall of your colon, called diverticula, get inflamed or infected, Dr. Boxer explains. “It usually causes pain on the lower left side of your belly ...

If you experience sudden or intermittent pain under your left rib cage or breast ... This can cause severe chest pain that may radiate to the left side, including under the left rib cage.