I got a white line on my inner upper lip, it looks like a vain but then white.
I have this for a while now and it doesn't get worse nor hurt, I'm sure I didn't have this before I started playing the trumpet (1,5 year back).
I don't have the feeling that I'm paying with too much pressure, I've asked my teacher and she agrees.

Doesn't anyone have experiens with this? Can I do anything about it, or is this no problem.