<s>[INST] My 14 yr old son has a pain in his chest/ribs and hurts a lot when he breathes in and also when walking around. He did do some tubing on the bay yesterday and we are not sure if this is muscle related but he usually doesn't complain so we are concerned. [/INST] Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. * As far as my clinical experience is concerned, possible muscle or    ligament stretch likely. * In my clinic, after thorough clinical examination, I recommend - Analgesic tablets - Local anesthetic ointment or spray - Re evaluation after 48 hours for further management with medicines or need of an x-ray or else. Hope I have answered your query. Let me know if I can assist you further. </s>