Dentist near Velachery | Myth: Sugar Alone Causes Cavities Contrary to popular belief, sugar alone doesn’t cause cavities. Cavities develop when bacteria in your mouth feed on sugars, producing acids that erode the enamel. While sugar is a contributing factor, poor oral hygiene, frequent snacking, and not brushing after meals play a bigger role in tooth decay. At Dr. Akkshaya Dental & Aesthetics, we emphasize maintaining a balanced diet and practicing good oral hygiene to keep your teeth healthy and cavity-free.