Also known as dental caries, cavities, or caries, is a breakdown of teeth due to activities of bacteria. The cavities may be a number of different colors from yellow to black.
Symptoms:
First, KA shows up as small, round bump. Then, it grows into a lesion or wound and reaches a size of between 1 and 2 centimeters within a few weeks. The wound looks like a dome with a plug made of brown keratin, which is the same material as hair and skin.