What Does Tooth Decay Look Like?

Tooth decay doesn’t appear overnight — it moves through recognizable stages, and catching it earlier generally means a simpler, less invasive fix.

Early stage: white spots

The first visible sign is often a chalky white spot on the tooth surface, where minerals have started leaching out of the enamel. At this stage, decay may still be reversible with fluoride and better hygiene.

Progressing decay: brown or black staining

As decay advances, the affected area often darkens to a light brown, then a darker brown or black, as the demineralized enamel breaks down further.

Visible cavities

Eventually, a hole or pit becomes visible — sometimes with a rough or soft texture when you run your tongue over it. At this stage, the decay has moved past the point of reversal and needs a filling or other restoration.

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Signs beyond appearance

• Sensitivity to hot, cold, or sweet foods
• Pain when biting down
• Visible pits or holes
• Staining on any surface of the tooth

Why regular checkups matter

Early-stage white spots are often invisible without a trained eye and proper lighting — which is exactly why routine exams matter, even when nothing hurts yet. The earlier decay is caught, the more conservative the treatment.

Noticed a spot or stain that concerns you? Book an exam and we’ll take a proper look.

For more on this, see our restoration dentistry page.