My son has some signs of OCD, like his older sister, but he can hide them when he is talking to doctors. At times he has had tics that came out when he was stressed, but he has always been able to suppress these tics when he was on stage. We read about Tourettes syndrome, but he doesn't think he has this because he can control them when he needs to, but when we are reading together and he makes a joke, he will tell me it is a form of Tourettes and then tell me he couldn't suppress the urge to make the joke.