How Can I Tell If I Have a Cavity Between My Teeth?

July 12, 2026

Woman holding toothbrush and holding other hand to face in pain.

Most people likely imagine a cavity as a dark spot on the chewing surface of a tooth. However, cavities can also develop between teeth, where they’re much harder to see. These “interproximal cavities” often go unnoticed in their early stages because they form in areas that aren’t visible when you smile or look in the mirror. So, how can you tell if you have a cavity between your teeth? Here are some common signs to watch for.

Increased Tooth Sensitivity

One of the earliest signs of a cavity between your teeth is increased sensitivity. You may notice a sharp twinge or lingering discomfort when eating or drinking something hot, cold, sweet, or acidic.

While sensitivity doesn’t always mean you have a cavity, it is a symptom that shouldn’t be ignored. A dental examination can determine whether tooth decay or another issue is responsible.

Pain When Flossing

Flossing shouldn’t hurt. If you consistently experience pain, tenderness, or bleeding in the same spot every time you floss, it could indicate a cavity forming between your teeth. As decay progresses, it can irritate the surrounding gum tissue and make cleaning that area uncomfortable.

Of course, bleeding gums can also be a sign of gingivitis or gum disease, so it’s important to have the area evaluated by your dentist.

Food Frequently Gets Stuck

If food constantly becomes trapped between the same two teeth, it may be a sign that decay has created a rough or damaged surface. Cavities can change the shape of a tooth, making it easier for food particles to become lodged.

Repeated food impaction can also irritate the gums and increase your risk of additional decay if the area isn’t cleaned thoroughly.

You May Not Notice Any Symptoms

One of the most challenging aspects of cavities between teeth is that they often don’t cause noticeable symptoms until they’ve become larger. In fact, many interproximal cavities are discovered during routine dental exams before patients experience any pain at all.

That’s one of the reasons regular dental checkups and X-rays are so important. Dental X-rays allow your dentist to detect cavities hidden between teeth long before they’re visible or painful, making treatment simpler and more conservative.

Preventing Cavities Between Your Teeth

The best way to reduce your risk of interproximal cavities is by brushing twice a day with fluoride toothpaste and flossing every day. Floss removes plaque and food particles from areas your toothbrush can’t reach, making it one of the most effective tools for preventing decay between teeth.

Limiting sugary snacks and beverages and visiting your dentist for regular cleanings and examinations also play an important role in protecting your smile.

A cavity between your teeth can develop quietly, but early treatment can prevent it from becoming a larger problem. If you’re experiencing sensitivity, discomfort when flossing, or food frequently getting stuck in the same area, schedule a dental appointment sooner rather than later!

About the Practice

Got a cavity that’s giving you fits? Whether it’s a decayed, chipped, or broken tooth, our team at Dentistry By Canyon Creek in Richardson, TX is prepared to use the latest techniques and materials to restore both your tooth’s aesthetics and function! We only partner with the best local labs in town, so you can rest assured you’re getting a quality restoration. Book your appointment online or call our office to schedule one at (972) 379-8693.