Trunk Tribulations: Discomfort in the trunk (both the chest in the front and the back) especially with movement, may be due to internal or external causes. Internal causes include the lining of the lungs (pleura) or heart (pericardium) or referred pain with movement of diaphragm with breathing. External causes include ribs, rib muscles and outer musculature. Pericarditis may cause pain in different positions.
Answered 3/17/2018
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