Most people know when they are allergic to certain metals, like those in jewelry.
However, those same allergies could be causing a much more severe reaction inside their mouth.
A few years ago, Cate Bennett could not relax when eating out.
Severe dental problems led to an infection in the crowns on her four front teeth and one mortifying moment at lunch with a friend.
Turns out, Cate's allergy to metals in jewelry also made her allergic to the metal crowns in her mouth.
"For 80 percent of the people that have an allergy on their skin, they also have a problem inside their mouth," says Prosthodontist, Joseph Kravitz.
The most common allergy is to nickel, but other metals, like gold and chromium can also cause problems.
The solution is simple; replace metal crowns with all ceramic ones and the allergies usual fade within a day.