Can you list the different possible reasons for months of llq abdominal pain, sometimes in groin or left side back. small amount of melena in stool. pain is constant, burning or pressure in changing areas of left abdomen. 33yr male?

Many causes: testicular torsion / hydrocele / spermatocele / varicocele / kidney stone / kidney infection / prostatits / urinary tract infection / bladder tumor / colitis / diverticulitis / and many other things less frequent in nature

LLQ: These symptoms in your age group are suggestive of inflammatory bowel disease such as Crohn' s disease. Ulcerative colitis usually has more diarrhea with red blood in the stools. Diverticulitis of the Left colon generally does not have associated bleeding. Kidney stones aren't very likely the problem. A gastroenterologist is best qualified to evaluate and treat you.