This is my first post here. This is a compulsion that I've had since my late teens, and I'm 21 now. The hypochondria side of me is afraid that this is caused by a brain tumor or by Tourette's Syndrome. The rational side of me knows that I would be in the hospital by now if I had a brain tumor, and that you don't just suddenly get Tourette's as a teenager.

When an inappropriate word pops in to my head at a bad time (work, class, etc.), I am so afraid that I'm just going to scream it out, so I say it silently inside my mouth. I am so anxious that people can read my lips and see that I'm swearing silently to myself. I try to move my lips as little as possible. I'm afraid that somebody will think I'm trying to insult them or something, when that is not the case at all.

Am I crazy for mouthing swear words to myself? It is so annoying. It's especially annoying now that I'm afraid that I have a brain tumor that's making me do this...