Hi, I am currently at the end of sophomore year in high school, and I've been playing the Trumpet for about 6 years now. I've been having this problem for a while now, where even after playing for a short duration of time, a very prominent red ring develops on my lips where the mouthpiece was. I assume that this is a pressure problem, but whenever I try to play with less pressure, I can't get some notes out, because air is escaping or some other problem. I've tried playing with a firmer embochure, but it seems like whenever I do, I can hardly make out some notes as well. This is starting the become very frustrating, because whatever is causing my problem, be it too much pressure or anything else, it is affecting my endurance, and my chops take forever to regain. Any help would be very much appreciated.