Then go in sooner. If a black spot on your tooth is a result of tooth decay, treatment varies on the severity of decay, Dr. Duangthip says. “For small cavities, your dentist may remove the ...

You may notice that a white spot on a tooth darkens to a brownish color. As enamel is weakened, small holes in your teeth called cavities, or dental caries, can form. Cavities will need to be ...