Since the beginning of this school year I have been playing 1st part 90% of the time. I am also first trumpet in jazz band, and as you may know, lead jazz music can be painfully high. I used to apply a ton of unnecessary pressure to squeeze out high notes, but lately I have been trying to change and relax my embouchure a little bite and have had a lot of success. I'm getting used to playing high without pressing my lips/teeth against the mouthpiece and it feels great when I can do it!. But every once in a while I totally forget about doing that and go back to my old ways. So today I went back pushing my lips really hard against the mouthpiece and in turn my teeth pressed hard against the inside of my lips. Now there are some indents in my mouth and there is one part where it feels like its cut, and it hurts a little bit. When I tried practicing today after coming home from a jazz rehearsal it hurt too much so I had to stop. Any advice on what I should do? I have had indents in my mouth before but in those cases I could still play, and if I took it easy for a day my lips would go back to normal. But this time it has me worried; I have read stories about trumpet players injuring their lips and having to quit playing for very long periods of time, and never being able to play normally again!