In short, I want to know if a blister on the outside of my lower lip can affect my playing, specifically my range. Last week I played 6 nights straight very hard and developed a blister. I took Sunday off and practiced a little Monday and played Tues and Wed of this week. The blister has gotten worse and more irritated and on Thurs and Fri I noticed I felt really weak and the higher end of my range is much harder to hit right now. Can a blister on the outside of the lip cause this? Thanks!!