Thats it really. My 3 year old drools a river but when I ask him if it hurts he says no, yet he's chewing on his hand a lot. He definately has a full set of gnashers and has had them for a long time now. I asked the GP about it, but she didnt take me seriously - I realise its not a serious problem but theres definately an excess saliva issue!
He's always been a drooler - he started at 10 weeks and pretty much for the first year, then on and off as teeth popped through. But the last tooth came through at least a year ago if not longer. The thing is its not constant, but lasts for weeks then stops for a bit then starts again.