GI causes in that area can include the pancreas as well as GERD, an ulcer, or inflammation of the upper digestive tract. You can consider blood tests looking at the pancreatic enzymes, as well as an upper GI series or upper endoscopy to look at the upper GI tract.
If the kidneys are of concern, you can consider an ultrasound for evaluation.
Other possible causes can include the heart (which can be evaluated via a stress test) as well as musculoskeletal-based pain.
These options can be discussed with your personal physician.
Followup with your personal physician is
essentialEssential balance
Essential hypertension
Essential tremor.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
http://www.straightfromthedoc.com