Cavity vs. Stain: How To Tell The Difference

October 29, 2025

Cavity Vs. Stain: How To Tell The Difference

TLDR

Tooth stains alter tooth color, while cavities form holes, compromise tooth structure, and may cause pain. Consistent brushing, flossing, and dental checkups are essential for preventing both issues.

Tooth stains and cavities are two of the most prevalent dental problems. Since they can initially appear similar, many individuals find it challenging to differentiate between a stain and a cavity.

Patients often ask questions such as “what does a cavity look like?” or “how do I know if it’s just a stain?” While both can appear as dark or discolored spots, understanding what distinguishes them can help you take the appropriate steps to protect your oral health. 

Our friendly dentists in Locust, near Midland, Oakboro, Stanfield, and Red Cross, NC —Dr. Zeitouni and Dr. Maxhuni are always happy to help you identify whether it’s a stain or a cavity and provide the proper treatment to restore your smile.

What Is A Cavity?

A cavity is a small hole in the tooth caused by decay. It begins when the bacteria in the mouth feed on sugars from food and produce acid. Over time, this acid weakens the enamel and creates tiny holes in the teeth.

What Are The Causes Of Cavities?

A combination of poor oral hygiene and excessive consumption of sugary foods causes cavities.

  • Having a dry mouth also increases the risk of tooth cavities. This is because saliva helps neutralize the acids produced by bacteria in your mouth.
  • And sometimes, genetics is to blame. Some people are more likely to have a tooth cavity just because of their genes.

What Is A Tooth Stain?

A tooth stain is a discolouration of the tooth. Unlike cavities, stains do not damage the structure of the teeth; they just alter the color of the enamel. They can make the enamel appear yellow, brown, gray, or even black.

What Are The Causes Of Tooth Stains?

We can put tooth stains into three categories based on their causes: 

  • Extrinsic stains: These are discolourations on the surface of the tooth and are caused by things like coffee, tea, wine, tobacco, or colored foods.
  • Intrinsic stains: These are discolourations inside the tooth and are caused by medications, trauma, or genetics.
  • Age-based strains: Aging also causes tooth discolouration as the enamel wears out over time.

How To Tell The Difference Between A Tooth Stain And A Cavity

The main difference between a cavity and a stain is that a cavity forms a hole in the tooth, while a stain affects the tooth’s surface and color. However, the colour of the teeth might reveal more information about the stain. Stains also tend to stay the same size over time and never cause pain. 

In contrast, tooth cavities have several symptoms. Here are four ways to confirm a cavity if you’re not sure.

  • Rough or uneven tooth texture
  • Hole in the tooth
  • Sensitivity to hot, cold, or sweet foods
  • Toothache or discomfort when biting

Outlook

Tooth stains are primarily cosmetic and can often be reversed. Cavities are a sign of tooth decay and require prompt dental care. If left untreated, they can lead to infection, abscesses, or even tooth loss.

How Can I Prevent Tooth Stains and Cavities?

Although there is a clear difference between cavity and stain, you can protect yourself from both by doing the following: 

  • Brush and floss twice daily to remove plaque.
  • Limit consumption of colored beverages such as coffee, tea, and soda.
  • Rinse your mouth with water after consuming staining foods.
  • Schedule regular dental cleanings in Locust, NC, to remove surface stains before they set in.

While the steps for preventing both cavities and stains are the same, their treatments differ.

What Are The Treatments For Tooth Stains?

The treatment for a tooth stain depends on its type and depth. Professional dental exams and cleanings, or a teeth whitening procedure, are the most common treatments for surface stains.

For deeper discoloration, our dentist may recommend veneers or bonding to cover the dark areas. These cosmetic treatments are quick and can produce lasting results when paired with good oral hygiene.

How To Get Rid Of Cavities

The only way to treat a cavity is through dental restoration. Our dentists may recommend fillings for minor decay, crowns for severe enamel loss, or root canal therapy for infected pulp. If the tooth cannot be saved, it will be extracted.

Treatment For Tooth Stains And Tooth Cavities In Locust, NC

Dr. Zeitouni, our dentist in Locust, NC, can recommend the proper treatment for tooth stains and cavities.

Having a tooth stain will mar your smile and confidence. A tooth cavity may have even more serious consequences.

Once you notice a dark spot on your tooth, do not second-guess it; come for a dental check-up to confirm it’s not an early-stage cavity. Our dentists in Locust, NC, will examine the affected area and recommend the proper treatment. Schedule an appointment today to safeguard your smile and oral health.

Key Takeaways

  • Tooth stains change the color of your enamel but do not harm your tooth structure.
  • Cavities create holes and cause lasting damage.
  • Regular brushing, flossing, and dental visits can prevent both cavities and stains.
  • Whitening treatments or veneers can fix stains, while cavities require fillings, crowns, or root canal therapy.
  • If you notice dark spots, don’t second-guess; visit Dr. Zeitouni and Dr. Maxhuni at Locust Family Dentistry to address the situation.

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