Why do My Teeth Look Darker at the Gum Line?

If you’re noticing darker areas or small notches near your gum line, you may be seeing abfraction lesions. These occur when enamel thins or wears away at the neck of the tooth, exposing the underlying dentin — which naturally looks more yellow or brown.

Two common causes are:

Clenching and grinding. Excess biting forces (often during sleep) cause teeth to flex microscopically over time, leading to stress at the gum line. Many people don’t realize they grind at night, but signs can include jaw soreness, headaches, or worn teeth.

Brushing too hard. Using a hard-bristled toothbrush or aggressive back-and-forth scrubbing can mechanically wear away enamel in this vulnerable area.

These lesions can lead to sensitivity and increase the risk of cavities if left untreated. The good news is that prevention is simple — use a soft or extra-soft toothbrush with gentle pressure, and a night guard to protect your teeth while you sleep if grinding may be contributing.

If you’re experiencing sensitivity or have cosmetic concerns, talk to us about a conservative filling option to restore comfort and blend the area naturally. Catching it early helps keep treatment simple and your smile strong.