Costochrondritis: Costochondritis occurs at the junction of the rib and breast bone(sternum) causing discomfort near the center of the chest. Your symptoms near the armpits would be more likely be due to strain of the rib cage muscles. I assume that exercise or work you do is responsible and,if so, you will have to modify your activities to allow healing. For further advice consult your physician if symptoms persis
Answered 11/23/2020
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See answer: Since exertion worsens chest pain, it is best to make sure it is not your heart or lungs. See your doctor for full evaluation.
Answered 10/22/2015
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