Pain in lower abdominal area. left hand side?

Some possibilities..: If one has very uncomfortable tummy pain, and is normally in good health plus is not pregnant, the possibilities include: appendicitis (usually R lower part), diverticulitis (usually L lower part), kidney stone (very painful), constipation (crampy), stomach flu, etc... Most people with moderate pain, more than mild pain, may need a doctor's evaluation to be sure it is not something serious.