Dental cavities are permanently damaged areas on your teeth that develop into holes. A plaque build-up of bacteria, saliva, food, and drink causes the damage. Plaque starts forming as soon as you eat and drink, so brushing and flossing your teeth is essential.
A cavity may not start as painful, but without a filling, it will increase in size and can lead to significant pain, resulting in an emergency dental visit and sometimes tooth loss. This is why seeing your dentist for your six-monthly dental checkups is so important.