I have a pain in my left side stomach and have a pain in back side of body?

Doctor to evaluate: If one has some uncomfortable tummy pain, and is normally in good health, plus is not pregnant, the possibilities include: appendicitis (usually lower R tummy), diverticulitis (usually L tummy), kidney stone (very painful), constipation (crampy on L), tumors, intestinal infections, etc... A person with more than brief, mild pain needs a doctor's evaluation to be sure it is not something serious.