First I have to admit that my anxiety of concussions has troubled me ever since I passed out and hit my head twice in high school (not sure which led to which because of temporary memory loss). The symptoms were mainly dizziness and headache. MRI showed everything was normal and I haven't pass out after that, so hitting my head again became my biggest concern. And I did hit it again and again.

But what's the most disturbing is hitting my head in dreams, because they are totally out of control. The devastating impact feels as real as hitting my head in real life and sometimes I can even hear the sound of the hit. After these dreams I always sleep more hours than usual and feel less functional.

Sometimes it's related to the situation in dream, sometimes it just happens randomly. Sometimes my head is close to the wall after I wake up. These dreams happen more and more frequently recently (several times a week), and now I'm worried that I'm hurting myself while asleep.

Has anyone else experienced anything similar? Did you find out the cause?