Q. My son is a 17-year-old lineman who just started his high school football season two weeks ago. He has developed pain in his lower back that gets worse whenever he is blocking. He had this pain last year, but it went away when he stopped playing football. However, this year it seems a lot worse and he has already sat out of practice twice. The trainer says it is just a lower back strain and he can play soon. I am worried it is more than that and wonder what I should have my son do?