aka spots, pimples etc. I've noticed over time that the standard of my playing goes up to a certain level then plummets back down - very frustrating. Theres another thread on this which may be relevant but I suspect for the moment the problem might be a spot thats come up right on the divide between the red thin tissue of my lip and the upper part of my face. Its situated ~ 5mm away from the corner of my mouth. I've noticed that my range and endurance has plummetted as this thing has grown and i'm wondering if this is a problem that others have found. These guys have come up before right where the mouthpiece contacts the lip but i've never seen my playing degrade as much as this time - perhaps the inflammation at the corners is preventing me getting a good seal and holding back on the pressure needed to play in the upper register. Its getting me down bigtime.