ds is 3, nealy 4, and over the past two weeks he's started dribbling like a baby. Its just running out of his mouth. its not bothering him in the slightest. I wondered if he had an ulcer or something but he denies any pain or discomfort. He has all his teeth, 20 right? Do teeth move around or grow? He was a very dribbly baby and is generally quite snotty. he also has a tongue tie but that seems the same. any ideas?