Thumb sucking is a soothing, reflexive behavior, a natural reflex for infants and young children and most children stop on their own. It begins in the womb, before birth. Infants and babies often continue this relaxing practice after birth, which often helps to soothe them into sleep.

Parents often worry about the effects of what is sucking the thumb will mean for your child. When a child continues to suck after they have teeth, can lead to "crooked" teeth and bite problems, affecting both baby teeth and permanent teeth.

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Thumb sucking can cause problems with the proper growth of the mouth and alignment of the teeth, causing the upper front teeth to the outer end of the upper jaw to narrow in the back. The roof of the mouth can also see a change because of this behavior, that brand of intervention is necessary in some cases to make sure the child can still chew well.

Although, some of this can be corrected with braces, also can cause problems such as slurred speech that may need to be repaired in therapy.

According to the American Dental Association, most children stop thumb-sucking somewhere between 2 and 4 years of age or by the time the permanent teeth are ready to erupt. At this time it could be too late.