Difficult to say: Without more of your medical history and a physical exam, it's impossible to say. The middle of your rib cage contains your heart, lungs, at the bottom, your stomach, pancreas, gallbladder, on the right, liver. I see you have had a lump removed recently, it could have something to do with that, but definitely contact a primary care doctor for an exam and thorough history, goodluck.
Answered 8/26/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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