please any doctors suggest why this teeth discoloration happens?? I won't give any sweets or junk to my baby. oral hygiene is maintained properly. brushing is done on a daily basis.

A. Your child is losing enamel on the teeth then that’s not a very good sign I will recommend you a dentist for this please visit your dentist as soon as you can get a proper checkup done by your doctor and they are going to give you proper advice as per the current situation