Should I worry about a cavity in my 6 year old son's tooth?

Take the child to a dentist to see if the decay is deep and if your child needs to get it filled. Chances are, the dentist will recommend to leave the tooth be as it is due to fall out soon. Ensure that your child maintains a good habit or brushing and if he's ready, flossing. A diet of moderate amounts of candy, soda pop and chocolates will be good as well.