Some of the common causes of chest pain in young adults are overexertion, cold, cough, [simple_tooltip text=pleurisy tooltip=Inflammation of the sheet-like layers that cover the lungs (the pleura) and is usually caused by viral or bacterial infections. ], pericarditis, and [simple_tooltip text=hypertrophic cardiomyopathy tooltip=A condition that causes the cardiac muscles to thicken, leading to incapacitated heart function and obstruction in blood flow. ].