Ok I know this has been asked before but I still can't seem to find a clear answer. When I move my neck forward, backward or around I hear (in my ears at least) a crackling and popping noise that seems to come from the back of my head where it meets my neck.
I've tried searching and I see things like gas pockets and ostyophytes rubbing and muscles stretching. But nothing seems to be certain. And from what I can find no one gets a definate answer from their doc.