Does sugar cause increased perspiration (sweating)?

It seems that whenever I eat something sugary before bed, I wake up in the morning absolutely drenched in sweat. It also just seems to happen to me if I have A LOT in the day. My grandfather says it's the sugar, but he's also a 75 year old who is VERY old-school with those kinds of things. He's the kind of person that will say something to scare you in an attempt to stop it.