Biting on aluminum foil can be painful. Learn how dental work creates a charge in your mouth. read more
Biting on aluminum foil can be painful and is usually noticed if you have metal in your mouth from dental work (e.g. fillings, crowns). Basically, when you bite on foil, you set up a battery in your mouth and the electrical current stimulates nerve endings in your tooth. read more
It is called galvanic shock. The minerals in your saliva combined with aluminum and other restorations in your mouth cases a small amount of electrical current which causes a painful stimulus in the nerves of the teeth. Beside the point, there is no good reason to chew or bite aluminum foil. So you should not so it. read more