Dull pain on lower rt side of abd. It comes & goes. Should I worry about appendicitis? It isn't horrible pain it's just noticeable.

Acute appendicitis. pain is usually preceded by nausea and vomiting, and mid abdominal pain that migrates to right lower quadrant over several hours. But this is the usual presentation, and it could present as almost any abdominal pain. It is referred to as a "protean" disease. Best to have a doctor take a look at you.