I am a grandmother of a 26 mo. old who has been drooling off and on since he was about 10 mo old. We thought he was teething but the pediatrician says all of his teeth are in so now we are wondering why so much drooling if teeth are in. I have read children with reflux drool, also children with allergies but can't pinpoint the cause definitely. He had bronchitis recently and has had a few cases of diarrhea, sometimes runny nose, sometimes stuffy nose, acts like teeth hurt sometimes. I have always thought it was a milk allergy but recently read about reflux and drooling. Does anyone have a suggestion about what could be causing the drooling.