Cavities are 1 of the most common dental issues, yet they often go unnoticed until they cause significant discomfort. Early detection and treatment can not only save you from pain but also help preserve your oral health.
What exactly does a cavity feel like? Cavities can have different symptoms, but the most common ones include:
- Tooth sensitivity
- Toothache or persistent pain
- Visible holes or discoloration
- Pain when chewing
- Bad taste or odour
- Swelling or gum discomfort
What Is a Cavity?
A cavity is a hole that forms in your tooth when the enamel (the hard, protective layer of your tooth) is damaged by decay. This decay is often caused by plaque—a sticky film of bacteria that forms on your teeth after eating or drinking sugary or starchy foods.
Without proper oral care, the bacteria in plaque produce acids that wear down your enamel. Over time, this can lead to the development of a cavity, which can extend to deeper layers of the tooth if untreated.
How Do You Get Cavities?
Several factors contribute to cavity formation:
- Poor Oral Hygiene: Irregular brushing and flossing can lead to plaque buildup.
- Diet: Consuming sugary and acidic foods and drinks can increase the risk of decay.
- Dry mouth: A lack of saliva reduces your mouth’s ability to cleanse itself and neutralize acids.
- Genetics: Some people are naturally more susceptible to cavities due to tooth shape or weaker enamel.
How to Tell if You Have a Cavity
The sensation of a cavity can vary depending on the person and the severity of the decay. Below are the most common signs and feelings associated with a cavity.
1. Tooth Sensitivity
One of the earliest signs of a cavity is tooth sensitivity. You may feel a sharp or mild tingling sensation when your tooth comes into contact with:
- Cold or hot drinks
- Sugary foods
- Acidic substances, like citrus fruits
This sensitivity occurs because the enamel has started to thin, exposing the dentin layer beneath. The dentin is full of tiny tubules that lead to your tooth’s nerves, making it more reactive to temperature and certain foods.
2. Toothache or Persistent Pain
A dull, persistent ache in 1 area of your mouth is another common symptom of a cavity. This pain can range from mild to severe, and it might feel worse when chewing or biting. Toothaches caused by cavities are generally a signal that the decay has progressed closer to the nerve of the tooth.
3. Visible Holes or Discolouration
Sometimes, cavities are visible long before you feel them. Look for:
- Small holes or pits in your tooth
- Brown, black, or white staining on the surface
If you notice any unusual marks, it’s time to book a visit with your dentist.
4. Pain When Chewing
Cavities can cause pain when you bite down or chew. This happens because the decay has reached deeper layers of the tooth, affecting the inner pulp or nerve tissue. The pressure from chewing worsens the irritation, causing discomfort.
5. Bad Taste or Odour
An untreated cavity can collect food particles and bacteria, leading to a bad taste in your mouth or unpleasant breath (halitosis). While this might not be painful, it’s an important signal that something is amiss with your oral health.
6. Swelling or Gum Discomfort
If a cavity isn’t treated early, it can lead to irritation in the surrounding gums. You may notice swelling, redness, or tenderness around the affected tooth. This could also indicate that an infection has developed, making immediate dental care essential.
What Happens if You Ignore a Cavity?
Cavities don’t get better on their own, and delaying treatment can lead to serious consequences, including:
- Larger cavities: The decay can spread, making the hole bigger and more challenging (and costly) to repair.
- Tooth infection: Untreated cavities can lead to abscesses, which are painful infections in the tooth or surrounding areas.
- Tooth loss: Severe decay may require tooth extraction if the tooth is damaged beyond repair.
Early detection is key to preventing these issues, so being proactive about your oral health is essential.
How Are Cavities Treated?
Fortunately, cavities are treatable. Your dentist can recommend the appropriate treatment based on the severity of the decay. Some options include:
- Fluoride treatments (for early-stage cavities): Fluoride can help repair minor damage to enamel and reverse early decay.
- Fillings (for moderate decay): After removing the decayed portion of the tooth, your dentist will fill the cavity with a durable material.
- Root canals (for severe cavities): If the decay reaches the nerve, a root canal may be necessary to remove the damaged tissue and save the tooth.
- Crowns (for extensive damage): A crown may be used to restore the function and appearance of a severely decayed tooth.

How to Prevent Cavities
The best way to avoid cavities is through consistent and proactive oral care:
- Brush twice daily. Use fluoride toothpaste to strengthen enamel and remove plaque.
- Floss daily. Clean between your teeth to remove trapped food particles.
- Visit your dentist regularly. Dental exams can detect problems early and save you a lot of hassle later.
- Limit sugary snacks. Reduce your intake of sweets and acidic beverages.
- Drink plenty of water. Staying hydrated helps wash away food particles and maintain healthy saliva levels.
Protect Your Smile for Years to Come
If you’re experiencing any signs of a cavity—whether it’s sensitivity, pain while chewing, or a visible hole—it’s time to visit a dentist. The earlier you address the issue, the easier the treatment will be.
Cavities may be common, but they’re preventable and treatable with the right approach. At Country Hills Dental Centre, our professional staff is trained to treat your cavities, no matter how large or small. Book your next dental exam with us today.