question: what can be some causes in over excess of saliva. My 11 year old daughter, who is 4 foot 5 inches and weights 70lbs, is having serious issues with her teeth. She does have sensitivity issues to brushing and tooth paste, however for the past year and a half I have taken her for cleanings every 3 months because the majority of her teeth had compromising areas. Since she was a toddler I took her every 6mths up until we moved 3 years ago. We had 1year gap until I found a dentist locally and that is when they told me her teeth were in bad shape. She brushes morning and night. I brush her teeth after her at night, useing a sonic toothbrush and rx strength fluoride. Just got back from dentist and she has two cavities since our last cleaning three months ago. The cavities are on molars and are one the inside by her tongue all the way through to the biting surface. They say she produces so much saliva that everything crystalizes on her teeth so fast. Is that possible. Is there something medically I should have checked out? Could stress be a factor? I have two other children and there teeth are fine. She has no other heath issues. Healthy child. Does not drink soda, coffee or tea...they ask me everytime since she has so much staining, and she does not eat candy!