From the time you’re a child, you’re warned that sugary drinks can be bad for your teeth. But many young people with Mountain Dew Mouth are finding out just how true those warnings are.

Mountain Dew Mouth refers to the tooth decay that accompanies the frequent consumption of soft drinks (pop soda), particularly — as you may have guessed — Mountain Dew.

The phenomenon is common in the Appalachian region of the United States, where 98 percent of people experience tooth decay before turning 44 years old.

But how does this widespread dental drama happen and what can you do to ensure your teeth remain healthy?