Since he was 3 or 4 my son has gone through periods of compulsive blinking, usually for a few weeks at a time, then it would go away for several months. We didn't bother too much about it, but now he's started again, and instead of a blink it's a real roll of the eyes and ducking his head at the same time. Has anyone else experienced this? I'm worried because it's now noticeable and I don't want him to be teased at school...