Many things - possib: Possibly serious. Heart/lung/musculoskeletal are most common. Can you breathe deeply and comfortably? Any nausea or shortness of breath? See a doctor right away.
Answered 3/6/2018
6k views
Not likely: The upper back is a common area for muscle tension. Serious problems would be cervical or thoracic discs with referred pain or referred pain from internal organs.
Answered 3/6/2018
6k views
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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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