I was doing a search on head tremors and found this thread. Ruthie gets head tremors but she is also epileptic and on phenobarbital. For the past few nights she has had them, I try everything to get rid of them but once I get them stopped, we got back to bed and they start back up. Usually it takes about 3-4 times of giving her something hard to chew on for her to actually stop. Hers only come on at nighttime and I'm having such a hard time finding what the triggers are that starts them. We've been dealing with them since we got her about 3 years ago and the epilepsy is new. She will have the tremors for about a week then they go away for a few months and then come back, it's a cycle. I'm very stumped on them