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Cavity Clues: 5 Ways to Tell If You Need a Dental Filling

June 6, 2025

Patient needing a dental filling pointing to mouth at dentist

Most people don’t wake up thinking, “Today’s the day I get a dental filling.” In fact, cavities have a sneaky way of showing up when you least expect them. That’s why recognizing the early warning signs is key to stopping tooth decay before it turns into something more serious. If you’re wondering if you need a filling, continue reading. You’ll find the five biggest clues your teeth might need a fix.

1. Tooth Sensitivity

If you feel a sharp, stabbing pain when eating or drinking something hot, cold, or sweet, it could mean enamel has worn away. This exposes the softer layers underneath that lead directly to the nerve center of your tooth, causing intermittent discomfort. While not all sensitivity means a cavity, it’s one of the earliest signs your tooth may need attention.

2. Visible Holes or Dark Spots

Sometimes, you can actually see a cavity forming! Small dark spots, pits, or even visible holes in your teeth are a pretty good indication that decay has set in. If you see a spot that doesn’t look quite right, especially if it wasn’t there before, get it checked.

3. A Dull Ache in Your Tooth

A tooth that constantly aches, even if just a little, shouldn’t be ignored. Persistent discomfort often signals that decay has reached deeper into the structure of your tooth and may be on the verge of causing an infection.  If this is the case, it needs to be filled before it worsens.

4. Food Keeps Getting Stuck

If food seems to catch in the same spot every time you eat, you might be dealing with a cavity or a cracked filling. This often happens when decay creates small grooves or pockets in the enamel. The only remedy is to floss and rinse thoroughly at least twice a day,

5. Floss Tears or Snags

Speaking of flossing, if yours shreds or catches between certain teeth, it could be a sign of a rough or uneven surface caused by decay. Oftentimes, cavities can grow between teeth where you can’t see them before they get bad enough to tear floss apart.

When In Doubt, Ask Your Dentist

Cavities don’t always hurt right away, so it’s possible to need a filling without realizing it. Regular dental checkups are the best way to catch small problems early before they turn into bigger (and more expensive) ones.

If you notice any of these signs, don’t wait. Cavities caught in the act are easy to treat with a simple filling. However, if left alone, they can lead to infections, root canals, or even tooth loss. In any case, it’s best to play it safe and call your dentist because your smile is worth protecting!

About the Practice

It’s no secret that catching cavities early leads to better outcomes and easier treatments. That’s why our team at Blue Coast Dental Group focuses on patient education and preventive care. If you can recognize the signs that a dental filling might be needed and feel confident enough to ask for help, we can take care of the rest! Call (310) 424-3100 to schedule a tooth loss consultation with us or visit our website to discover more about our services.