Bronchialis pain

Hey everyone! im new here and i decided to see what kind of responses i would get from the site. First of all im 15 y/o and just a couple weeks ago, i seemed to be having pain between my bicep and tricep. My trainer told me it could be my bronchialis. I can pitch about 3 innings and then im done. Besides rest, is there anything i can do to help my arm recover(Specific tubing exercises, icing)?

Thanks,
CobraBaseball30