The first thing that comes to mind . What kind of food is he on.?Are his poops hard? I was told by the vet when tede was so sick hard poop help with the glands. BUt I am sur other people that are more experenced can help more. Tede had lots of these kinds of stuff till I changed his food.
just a thought
j.g &
p.s. yes tede had times he just wanted to be under his blankets when his teeth were coming in. I would do Ice chips and rub it on his little gums. It was good now he let me go in his moth for teeth brushing.