Hello My 7 year old son has been complaining of chest burning and pain when he excersises. He said it starts to hurt when he begins to sweat. Last night we were throwing football down stairs and after about 20 min he had to lay down. he said mommy feel this. Does it feel hot. I said no baby. he said it is burning. It hurts so bad mommy. I am wondering what this could be. He had SVT when he was younger. probably about 3 yrs old. has been perfectly healthy sionce. He was never on meds cause he only got an attack once in a long while. but has not had any since he was 3.