Why Is It Painful To Bite Aluminum Foil?


Why is it so dang painful? Jaenudin Wasta/EyeEm/Getty Images
Why is it so dang painful? Jaenudin Wasta/EyeEm/Getty Images

When (dental) metal in your mouth comes in contact with aluminum foil, your teeth get a painful shock from the electricity produced. Christian Sager explains how the voltaic effect plays out in your mouth in this episode of BrainStuff.