BFS isn't 100% dependent on anxiety. I mean, you never want to flip out and start panicking over anything, that is absolutely the worst thing a person with BFS can ever do. You have to learn to turn off that part of your brain. You never ever want to spin out of control over anything.However, BFS sort of moves on its own timeline. It will move around your body and do whatever it wants. The way I have always described BFS is that it is like a bratty little 3-year old who always wants attention. If your legs are twitching, and you don't care about it and don't feed your body with panic and adrenaline over what is going on with your legs, pretty soon your BFS will get bored and it will move on to something else. Okay, so your legs don't bother you. Well how about if I mess with your HAND. Then say you just ignore your twitching hand, and then your BFS will get bored again and will try something else. Okay well how about I mess with your THROAT?!? I know there is no scientific evidence whatsoever to back that up, but that is the analogy that I have always used when I describe my BFS. If I don't give it attention, it is going to start moving around and trying different things until it gets the attention that it wants. Your body (the bratty 3 year old) has decided that your tonsils are what is going to get attention from you at the moment. So the game now is to find some way -not- to give it that attention. Then it will get bored and your BFS will just move along to start messing with something else.This is the dance of BFS. It's not really scary after a while, but it sure can be annoying. Any veteran who has had BFS for a while will be able to relate to this.