This is a query to Dr. Varsha.
Dear Doctor: I've been brushing my baby's teeth from when he was 13 months old (when he had 4 teeth) with a finger brush. He is now 18 months old. In the last couple of months he has developed peculiar black stains on his upper teeth and any amount of brushing / cleaning is not helping in removing these. Can you please suggest what we can do? Thanks a ton!