Most infants suck their thumbs. But at what age do most children begin sucking their fingers? Learn more about these harmful habits and how to break them.

Choosing a thumb guard is the first step to breaking a child’s thumb-sucking habit. What size is right? Here’s a quick guide to choosing thumb guard sizes.

Thumb-sucking in infancy is normal, even before birth. What you should know about thumb-sucking in the womb can help break your child’s habit when it’s time.

Many link thumb- and finger-sucking with comfort in children. But why? What goes on in the brain? How do thumb- and finger-sucking affect their neurotransmitters?

School-age children who suck their thumbs may be targets of bullying. But does thumb sucking cause social anxiety, or is it the result of it?