Since my rib resection surgeries, I have trained myself to move throughout the night - ever so slightly - to prevent freezing up of my muscles and neck/spine. I have noticed that when I drink (no more than 1 cocktail or glass of wine), it relaxes me to the point that I lie very still as I sleep. This in turn, causes my neck and muscles to freeze (lock up) and that can be VERY painful. I feel like my pillow had turned into a brick overnight!
Hope this helps,
Anne