Technically known as dental caries / cavity is a disease of the tooth of bacterial origin. You probably know dental cavity as a hole in a tooth This is the result of tooth decay process that happens overtime, eventually leading to the damage of the tooth structure.
Decay in tooth left untreated reaches the dental pulp causing abscess.
Symptoms
Fever, pain while chewing, sensitivity of teeth to hot or cold, bitter taste in mouth, foul smell, swollen neck glands, redness and swelling of gums, swollen area of the upper or lower jaw, an open draining sore on the side of the gums…
Treatment: Abscess can be surgically removed.