I used it when I was a kid. I only remember that the pain stopped after moxibustion. It's probably a piece of flour around the ear. A small porcelain cup was baked with Sang Mu fire and buckled on the face ring. Sprinkling chopped green onion on the bottom of the cup will explode, just bake it a few times without heating. Maybe I didn't change my teeth at that time, but it has been many years.