Good evening everyone.For over 15 years i play trumpet to the local band and i usually play the high notes due to my experience.I use a no-name 7c mouthpiece. Recently a problem with my lips occured. 4 months ago we were in a concert and when we played the last score the audience requested another one.That last score had an high A and i struggled to make it happen but this damaged my upper lip. This happened again 3 weeks ago when we were practicing for Christmas.A layer of the skin from the upper lip was removed due to the over effort.The lip healed but whenever i touch the mouth piece i feel that i will damage my lips again. Is there any way to strengthen the lips to avoid further future damage? Thanks for reading.