I have been experiencing a dull pain on the right side of my body on the bottom of my rib cage. it hurts right after i eat. what could this be?

Some possibilities: If one has very uncomfortable tummy pain, and is normally in good health, plus is not pregnant, the possibilities include: appendicitis (usually has fever), gall stones, kidney stone (very painful), constipation (crampy), stomach flu, etc... Most people with pain after meals, need a doctor's evaluation to be sure it is not gall stones, which may need an ultrasound scan and eventual surgery.