So I can wiggle my ears but only sometimes, right now I can move my left but not the right, other times it's the right but most of time I can't and it's like th

So I can wiggle my ears but only sometimes, right now I can move my left but not the right, other times it's the right but most of time I can't and it's like the nerve is missing. It's usually something I notice when I'm relaxed and horizontal