I've had some odd sensitivity or tightness in the upper abdomen. It's under the chest, and I've had my heart checked out several times, including an angiogram and recent EKGs. Nothing wrong with the heart. This is a tightness or cramped feeling on both right and left sides.

I have some dyspepsia going on also, and am being treated for that. But I'm wondering what the upper abdomen tightness could be. The 'net isn't much help - I see at least 50 possible causes ranging from next to nothing up to cancer. Anyone have practical experience with these symptoms?