My 7 year old son is complaining of sudden chest pain, right side near his rib. he spent the day swimming, is not over tired or behaving unusually. he bey flopped a few times, should i be worried?

Usually not serious: Sharp knife like pain in the chest in your age group is typically not serious. It can indicate several causes including Heart burn, a pinched nerve in the chest or chest wall muscle spasm. These are typically one time or short lasting episodes that do not return. If you experience repeated episodes of sharp knifelike pain, see a Dr for a thorough evaluation.