What Happens If You Ignore a Cavity?

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12 Dec 2025 Time - 09:00 pm

Cavities might start small, but they can quickly turn into a big problem if left untreated. Many people think a little tooth pain or sensitivity isn’t a big deal—but ignoring a cavity can lead to serious dental (and even health) issues down the road.

Here’s what really happens when you don’t treat a cavity:

1. The Decay Keeps Spreading

A cavity is essentially a hole in your tooth caused by bacteria. Once decay starts, it doesn’t stop on its own. The bacteria continue to eat away at your enamel, the hard outer layer of your tooth, and eventually reach the softer inner layers (dentin and pulp).

2. Increased Sensitivity and Pain

As the cavity deepens, you’ll likely start feeling sensitivity to hot, cold, or sweet foods. Over time, that sensitivity can turn into sharp pain—even when you’re not eating or drinking anything.

3. Infection and Abscess

If the decay reaches the pulp (the nerve center of your tooth), bacteria can cause an infection. This often leads to a painful abscess, swelling, and sometimes even a fever. At this stage, a simple filling won’t fix the problem—you may need a root canal or even a tooth extraction.

4. Damage to Surrounding Teeth

Bacteria from an untreated cavity can spread to nearby teeth, increasing your risk of developing additional cavities or infections.

5. Higher Treatment Costs

What could have been fixed with a small filling can turn into a costly procedure like a crown, root canal, or extraction—plus the cost of replacing the tooth later with a bridge or dental implant.

6. Possible Systemic Health Issues

Severe dental infections can sometimes spread beyond the mouth, potentially affecting other parts of your body. Oral health is closely linked to your overall health—so taking care of your teeth helps protect your entire body.

The Bottom Line

Ignoring a cavity won’t make it go away—it will only make things worse. The sooner you see your dentist, the simpler (and less expensive) the treatment will be. Regular dental checkups and good oral hygiene are the best ways to keep cavities from becoming a serious problem.

Pro Tip: Brush twice a day, floss daily, and schedule regular cleanings to keep your smile healthy and cavity-free!