7. Sucking Your Thumb Gives You Buck Teeth.
For generations, parents have warned their children that sucking their thumb can give them buck teeth later in life. It may seem like an idea that would have gone the way of the Dodo, but it’s an entirely real possibility. Thumb-sucking is common among young children. But if it keeps going on when a child’s permanent teeth start to grow in, the teeth can become misaligned and, eventually, push top teeth out. If you want to avoid a pricey set of braces, encourage your child to stop sucking their thumb after they reach the age of 6!