Aw, come on, Sqad...I'm QuizmONster and I'd never dream of calling YOU SqUad! (I mention it solely because there actually IS an Answerbanker called Quizmaster.)
I have to say, though, that I like the idea of having a medical 'sign' named after me!
Sqad, if drug addiction and obesity may now be seen as diseases, I can see no reason why boredom should not be one, too. So, perhaps journalists who have to spend their days in the press gallery at Westminster listening to endless political droning might claim to have a condition one sign of which will be endless oscitation.
We usually yawn to maintain the right oxygen level in our body. Whenever our body doesn't get the appropriate amount of oxygen, it respond towards that results into yawning.So it is possible that we may yawn during sleep too.