Hey trumpet community! I seem to be having a embouchure problem for some time (about a year or so). After just playing for 10-15m maybe 20 minutes I get extremely tired. Its not the corners of my mouth that start to hurt (unless I'm doing slurring) but the center or the upper part of my lip. I get a real burning sensation from it especially in the upper register. I do tend to lower my Jaw when going "Up", I've been told that maybe its because my lower lip is not exactly aligned with my upper teeth, its actually beneath my upper teeth or better describes as my bottom lip tucks behind my teeth. Maybe because I role in my lips? I really don't now and its very frustrating when I have to play very high notes in my Salsa Orchestra. I know its hard to determine or diagnose my problem without actually seeing me but perhaps you know or had my problem and can help me solve it and make me last longer. Again, its not my corners its my upper lip and sometimes center but mostly upper. Thanks for your time and responses!