Glad to hear everything was fine! When my dog starts licking his butt, I usually tell him no-no and he stops
as yes it could turn into a problem in itself! Most of the time, this happens after he has been sleeping!
I always keep a close eye on it to make sure he gets to the vet when he needs it! One dog we used to have (american eskimo) she had problems with her glands when she got old. They literally bursted from the inside out! It looked like someone slit her rear end! This is what you have to watch for!!