Do you have a cavity?

By Dr. Stephanie McGann, DMD FAGD, Columnist, The Times How do you know if you have a cavity? According to the National Institutes of Health, the most prevalent health condition after the common cold is tooth decay. It’s more than likely that if you haven’t already had a cavity, you will develop at least one in your lifetime. So, how do you know if you have a cavity? Well, depending on the severity...