Thumb Sucking 

Sucking is a natural reflex that relaxes and comforts babies and toddlers. Children usually cease thumb sucking when the permanent front teeth are ready to erupt. Typically, children stop between the ages of 2 and 4 years. Thumb sucking that persists beyond the eruption of primary teeth can cause improper growth of the mouth and misalignment of the teeth. If you notice prolonged and/or vigorous thumb sucking behavior in your child, talk to your dentist.

Here are some ways to help your child outgrow thumb sucking:

Don’t scold a child when they exhibit thumb sucking behavior; instead, praise them when they don’t thumb suck.

Focus on eliminating the cause of anxiety—thumb sucking is a comfort device that helps children cope with stress or discomfort.

Praise them when they refrain from the habit during difficult periods.

Place a bandage on the thumb or a sock on their hand at night.