Hello. I am a healthy, non-smoking, not drinking 49 yr old woman. I have had pain intermitent under my rib cage and chronic constipation most of my life. Recently I have changed my diet to a very low carb, high protien and fat diet. I feel overall more healthy and SO much more energetic. Although, I have developed a pain between my ribs, just under my sternum. Could this be chronic pancreatitis?