why does my left arm fall asleep everynight, over and over. i dont sleep in a wierd position, but it happens constantly. waking me up. it only happens a few months out of the year. My right arm will do the same, but less frequently.

It seems as soon as i lay down, my arm(s) starts to tingle, like its inevitable. Can my brain be causing this as well, i expect it to happen so it does? heh

As soon as i stand up, my arm starts to feel normal again. Its disturbing my sleep.