Somewhat odd condition and looking to find some answers. Not sure where to post this, if it should be posted soemwhere else, let me know.

22 old Male.

So as long as I can remeber, I can make myself shiver on command regardless of temeperature.. Somehow, I make the muscles (or at least, it feels like muscles)around the base of my spine, move?(I suppose thats the closest I can describe it)and it sends shivers up the spine, along my arm, up the neck and around to the end of my cheeks and chin.

Depending what position I'm in depeneds on the 'degree' of the intensity of shiver. Its most 'potent' when I am lying down and slighty less so when I sit straight up. It is very difficult to do when I am standing, however. It can only 'shiver' so many times in a row, like a battery, the intensity of the shiver decreases the more I force it in a short amount of time until I can't make the muscles produce it.

Now, they are no noticeable negative effects. However, I found out at a very young age, that when I am asleep and lets say, a nightmare comes to play and I don't feel like being eaten by the T-rex, if I can force my mind to focus on my actual body, I can use the shiver while asleep and it immediatly stops the dream and I wake up about 2 seconds later as if I wasnt having a dream at all.

Handy for nightmares, unknown to anything else, I don't really know how I do it but I would just like to know what this could be or mean.