Why does it hurt so bad when you bite down on foil ?!

Question: Why does it hurt so bad when you bite down on foil .?
Not that I do this intentionally lol, but when I do it by accident its incredibly painful . What causes that pain when foil comes in contact with teeth.?Health Question & Answer

When different metals come into contact, a Galvanic or direct current is set up. Amalgam fillings are a mixture of mercury, silver, tin, copper and zinc. When it touches tin foil a current flowing in one direction only is set up between the differing metals.Health Question & Answer

No, not a magnet, it's a chemical reaction. A transfer of electrons.Health Question & Answer

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If you have fillings in your teeth it acts like a magnetHealth Question & Answer

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