Hi. This looks like a case of fluorosis. If you stay anywhere in or around Rajasthan, Punjab, Haryana, Gujrat or Andhra Pradesh, don't use fluoridated toothpaste for your child. These areas have high fluoride content in its water. So if you are using mama earth's fluoridated toothpaste, don't use that.
Rest don't worry. Visit a dentist for a confirmed diagnosis. And avoid fluoridated toothpastes for now.
Next Steps
visit a dentist.