Middle chest hurts when laughing in son? going to doc today but what could it be? he's also had left chest pain, cough, and short of breathe

infection: The symptoms you describe are consistent with pneumonia probably viral if he has a fever he should go and see his primary care doctor to rule out bacterial pneumonia another possibility could be a pleurisy from trauma or a stretching injury in the rib cage.

CHESTPAIN COUGH SOB: If associated with fever, think of pneumonitis especially with rales. If not, it can be asthmatic attack with wheezing. Md will know after exam.