Having stained teeth can prevent you from loving your smile. Discoloration can make your pearly whites look less healthy than they once did and can make it more difficult for you to enjoy taking photos with loved ones and meeting new people. Though things like coffee, tea, and other stain-causing foods and beverages can make your smile look yellow, what are the causes of gray teeth? To help you determine what could be causing this, read on to learn about five potential culprits as well as how your dentist can help you solve this issue.