
19. Chewing Pencils Destroys Your Teeth
A common nervous habit that many people develop in childhood is chewing pencils. If you struggled with test anxiety as a kid, you might have chewed on your pencil before or while taking a test to help soothe yourself. While pencil-chewing may not be as damaging as, say, smoking, it can lead to or worsen a condition in the mouth called hyposensitivity. It means that the mouth is damaged so that the person cannot feel sensations as they normally would. In addition to hyposensitivity, pencil-chewing can cause cracks and fractures in the teeth. The habit can also damage the lining of the mouth and leave the person more susceptible to everyday pathogens, such as the cold and flu virus. Those splinters can also damage existing dental work, such as fillings or crowns.