Yeah don't press. :roll: Sorry couldn't resist. I have the same problem, but I have been given some exercises from the Arban, lip slurs and just long notes -pg 12 ex 7 and 8 etc are good. They are really simple, but sometimes you have to go back to the basics. Do the jumps, trying not to add anymore pressure as you hit the higher notes. They aren't very high, but it will strengthen your lip and you have to learn not to add pressure as you get higher. I am doing them at the moment, it is a pain, but perservere with them. Apparently you aren't supposed to press at all, but I can't see that every happending to me. My teeth have moved because of the amount of pressure I use!!
advert for Roddy's books. They are REALLY good and very useful, their is a thread of peoples reviews about it, but i cant find it. Consider buying Book 1 it is really excellent.
Their is a major focus on Mouthpiece pressure and what he says really works
Just a thought.
Edit: Here's the link to Roddy's Review Thread (RT)
I get it fairly often, usually through trying to hard. I find, however, if you use better breath control (not saying yours is bad!) then it reduces the pressure on your lips because your diaphrahms(sp?) doing most of the work.
Also, high notes (which can be a killer for the red lips), the more you play them (particularly with good breath control) the more you get used to them ... hence the reduced "effort" to reach them. Hey presto, no red lips!