Several things: Costochondritis or inflammation of anterior ribs and strained muscles can cause pain. Obviously cardiac issues occur in this region. Referred pain from below diaphragm such as gaseous distention of splenic flexure of colon , stomach distention , ge reflux, and pancreatitis. In the chest pleuritis, infammation of lining of left lung and pulmonary inflammatory process within the left lung possible.
Answered 12/10/2013
4.9k views
Many things: Sounds muscular or bone related. Cancer would be uncommon at your age except in patients with inherited cancer traits.
Answered 9/7/2013
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