After a fairly long, and strange dream about having one side of my jaw locked, i woke up. Now, in dream, the left side of my jaw "locked" after getting punched in the face by one of my teachers. Long story short i woke up and the left side of my jaw, where it was hit, ached like hell. Off topic slightly, i remembered this dream in near full. Took up a whole page of my dream journal . Anyway, is this a co-incidence, or can dreams really hurt your physical body?