# chewing on tinfoil

**URL:** <https://boards.straightdope.com/t/chewing-on-tinfoil/221518>\
**Category:** Factual Questions\
**Created:** [December 29, 2003, 3:35am UTC](https://boards.straightdope.com/t/chewing-on-tinfoil/221518 "2003-12-29T03:35:27Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![pool](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pool/32/4152_2.png) [@pool](https://boards.straightdope.com/u/pool)\
**Post date:** [December 29, 2003, 3:35am UTC](https://boards.straightdope.com/t/chewing-on-tinfoil/221518/1 "2003-12-29T03:35:27Z")

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why does chewing on tinfoil hurt your teeth?  
Does it just hurt if you have a cavity or fillings in your teeth?

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**Author:** ![NBIT33](https://avatars.discourse-cdn.com/v4/letter/n/71c47a/32.png) [@NBIT33](https://boards.straightdope.com/u/NBIT33)\
**Post date:** [December 29, 2003, 3:40am UTC](https://boards.straightdope.com/t/chewing-on-tinfoil/221518/2 "2003-12-29T03:40:38Z")

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No - I’ve got neither & when I did it, I wanted to be dead.

It hurts to just read this thread.

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**Author:** ![scm1001](https://avatars.discourse-cdn.com/v4/letter/s/c4cdca/32.png) [@scm1001](https://boards.straightdope.com/u/scm1001)\
**Post date:** [December 29, 2003, 3:45am UTC](https://boards.straightdope.com/t/chewing-on-tinfoil/221518/3 "2003-12-29T03:45:36Z")

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I imagine you are getting a galvanic reaction between the metal fillings and the aluminium foil - causing a little current to flow between them stimulating the nerve either directly or indirectly

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**Author:** ![Paco](https://avatars.discourse-cdn.com/v4/letter/p/a6a055/32.png) [@Paco](https://boards.straightdope.com/u/Paco)\
**Post date:** [December 29, 2003, 3:46am UTC](https://boards.straightdope.com/t/chewing-on-tinfoil/221518/4 "2003-12-29T03:46:34Z")

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[http://www.tambcd.edu/DentalCE/askdoc/html/tin\_foil\_bite\_shocks.html](http://www.tambcd.edu/DentalCE/askdoc/html/tin_foil_bite_shocks.html)

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**Author:** ![pool](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pool/32/4152_2.png) [@pool](https://boards.straightdope.com/u/pool)\
**Post date:** [December 29, 2003, 3:49am UTC](https://boards.straightdope.com/t/chewing-on-tinfoil/221518/5 "2003-12-29T03:49:03Z")

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thanks for the quick replies