What causes stiffness and tightness in the entire upper abdomen up into the ribs?

See below: This problem mandates a real-time (face-to-face) meeting with a doctor. A history has to be taken along with a examination as well as labs and other tests. Only after all this will your doctor be in a position to tell you what's wrong and what needs to be done to help you.

Many things: Anything from gas to ulcers can cause these feelings. If you're able to keep fluids down and not have a high fever, things should be fine. If symptoms worsen, see your family doctor.