I have a high school student who frequently experiences pain in his upper chest while playing. He has described it as a tight feeling. I have worked with him using a breathing bag as well as on the horn to making sure that he is getting enough air in and is moving it out without holding it in. Overall he is a good player with a good tone although he doesn't practice regularly. As a student I never remember having chest tightness like he has described. Can anyone help me out? I do not want him to injure himself or be discouraged from practicing. Also, I dont believe that he is hyperventilating because he has never experienced any severe light headedness. It seems to happen with him when he is playing between G in the staff to A/Bflat above the staff. Any suggestions would be greatly appreciated.