#asktheexpert He is 21 months old, since last few days we can see few black stains in his teeth. We are brushing his teeth twice but now do not understand what to do more.

A. these look like stains not cavities. but best is to viist a dentist and get it checked. brush twice daily using a grain size of kids age appropriate toothpaste like colgate kids, cheerio or kidodent. if you are giving any supplements that can ne a reason