Left lower quadrant pain can be caused by diverticulitis,
inflammatoryInflammatory bowel disease
Ulcerative colitis bowel disease, constipation, a hernia or a muscle strain amongst other causes.
I would be evaluated by your physician for these causes. Diverticulitis is primarily a clinical diagnosis, and if your physician suspects this you can consider antibiotics. A hernia as well as a muscle strain can also be determined via physical exam.
If the diagnosis continues to be non-revealing, you can consider a CT scan or colonoscopy for a more thorough evaluation. I would not settle on a musculoskeletal cause until the GI causes have been ruled out.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b