1 doctor weighed in:

Have pain under left arm and breast?

1 doctor weighed in
Dr. Thomas Namey
Internal Medicine - Rheumatology

In brief: Most likely..

Sprained chest wall muscle or rib issue.
Try aleve (naproxen). If pain persists, see your doctor! need more info. Is it positional? Does moving make it hurt? Unlikely to be arm or shoulder.

In brief: Most likely..

Sprained chest wall muscle or rib issue.
Try aleve (naproxen). If pain persists, see your doctor! need more info. Is it positional? Does moving make it hurt? Unlikely to be arm or shoulder.
Dr. Thomas Namey
Dr. Thomas Namey
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