Chinchilla Teeth

If a chinchilllas teeth have grown too long, what can be done about it? My chinchilla may be drooling(?) he has been getting wet from the mouth down his belly and has been pulling out his belly hair...his skin is clear and slightly pink and appears to be in good condition.... I've dried him several times because he is "wet"...His ears, nose and eyes are clear and clean and he is energetic ,eating and pooping with no diarrhea....From what I've read, he could either be stressed and/or having teeth problems....Another site I found said it is likely stress....What do you think? What can I do? He has plenty of things in his cage to chew on and I feed him Timothy Hay and Timothy chinchilla food...with an occasional carrot or raisin...Help!

Hello, your ansswer with my previous question was very halpful, but I have a few more:
Since their teeth grow throughout their lives does that mean that they are prone to malocclusion or abseces?
Have your chinchillas had either one?
if so, was the treatment difficult or alot of extra maintanence?
I'm sorry, I know that those are alot of question but the answer really affects my decision to get one. Thanks for all your help.

i have baught a mineral block for my new chinchilla, its called "gnaw it chinchilla nibble" is this going to be ok? it looks kinda like a pumice stone type block, i was just wondering as i know there are many products sold for chinchillas that arent actually very good for them.