Boxer (yep, that one) is suddenly drooly...to worry?

You may remember Hot Rod, who recently literally stirred up a hornet’s nest. (Well, yellowjackets.) He’s a small 5 year old boxer.
He’s never been a drooly dog, but recently–the last 3 days or so–he’s begun to drool a little. Not a lot, but about the way he drools when he’s gazing lustfully at my dinner plate. I thought perhaps it was the ungodly heat we’ve had lately, but it’s cooled off to more normal temps, and he’s still drippy.
Any ideas?

My worry? I was afraid that, when I saw the title, it might have something to do with underwear.
Back on topic, have you called your vet yet?

I was hoping for pictures of a drooling Barbara Boxer (D-CA), perhaps while asleep or something.

Drooling can be a sign of dental disease.

Article on overdrooling.

I’ve just spent the last 10 minutes looking in my dogs’ mouths and making comparisons. I don’t think they enjoyed it much.
I didn’t know the roof of a dogs mouth would be so soft. But where the other dogs have a sort of soft rubbery roof-of-mouth, I’d say his is a little softer, maybe a bit swollen. And there is a significantly softer spot just behind his front teeth. I don’t know if this has to do with it or not–it isn’t inflamed or red or anything, and he’s eating/drinking/acting just fine otherwise.
I’ll probably have to take him to the vet after the 5th when I get paid again.
His gums look okay as far as I can tell. Hmm. I thought of dental disease, but it occurred so suddenly–I figured you’d see a gradual onset with dental problems?

Well, I’m speaking from experience with cats, not dogs. Gum disease or other pain can cause drooling in cats.

My guess is that it has something to do with the yellowjackets or whatever. Yeah, he is still drooling excessively by the 5’th, call the vet.

Hypersalivation can also be a sign of nausea. He’s eating and drinking OK? Appetite normal? Dental problems in themselves can be gradual, but the dog’s reaction to them can be fine one day, then drool the next. A dental checkup in a 5 year old is certainly a good idea. Looking for something stuck in his gums is a good idea, too. If he’s been on anything like diphenhydramine for the hornet sting, it could be a side effect.

My cat’s excessive drooling generated a vet trip which produced a diagnosis of pancreatitis. A little googling shows dogs can have this issue as well.

He was on Benadryl for a couple of days post-sting. Yep, appetite etc is all good as ever. Just today I caught him stealing muffins one by one and sneaking off to another room to eat them.
I’ll see how he’s doing by payday, and report back if we go to the vet. Thanks, folks!