I’ve had this since I was 22 (I’m 62 now). It will start with what feels like a worm moving inside my bottom lip. The next day, they puff up, especially the top lip. The next day, they seep clear fluid, which dries on my lips and makes it feel like sand on them. The next day the swelling goes down. The next day it’s down to almost normal, then is gone for another few years. I use plain old chapstick. Everything else I’ve tried makes it worse. What is it, and how do I make it stop?