Why Your Tooth Hurts When You Chew

If you feel pain every time you bite down, your tooth is trying to tell you something. Chewing pain isn’t normal — and it’s rarely something that goes away on its own.

At Ballantyne Endodontics, we often see patients who say, “My tooth hurts when I chew.” Sometimes it’s a simple adjustment; other times, it signals a deeper issue such as a cracked tooth or root infection.

Here are the most common reasons behind chewing pain and what you can do about them.

10 Common Causes of Chewing Pain

1. A Cavity

Deep cavities expose sensitive inner layers of your tooth. Once decay reaches the dentin or pulp, pain during chewing is common.
Early treatment with a simple filling can usually fix the problem.

2. A Cracked or Fractured Tooth

Even a small crack can cause pain, especially under chewing pressure. Cracks allow temperature and bacteria to reach the pulp, leading to sensitivity or infection.

Treatment may include a crown, root canal therapy or extraction, depending on severity.

3. A High Crown or Filling

If a new crown or filling feels “off,” it might be too high. This imbalance places extra force on one tooth and causes soreness.

Your dentist can easily adjust the bite to eliminate discomfort.

4. Jaw Misalignment (Malocclusion)

When your bite isn’t aligned, chewing forces aren’t distributed evenly, stressing certain teeth. Minor adjustments or orthodontic treatments can correct the issue.

5. A Dental Abscess

An abscess forms when infection reaches the tooth’s root, often causing sharp pain when chewing or biting. You might also notice swelling or a bad taste.

A root canal is often needed to remove the infection and save the tooth. Left untreated, an abscess can spread and become serious.

6. Past Tooth Trauma

Old dental injuries from sports, grinding, or accidents can cause lingering pulp or root damage. Over time, this may lead to pain and/or resorption.

Your endodontist can evaluate whether the tooth can be stabilized and/or needs endodontic treatment.

7. Sinus Congestion or Infection

Because upper molars sit near the sinus cavities, sinus inflammation can mimic tooth pain when chewing. If dental causes are ruled out, your doctor can address sinus issues directly.

8. Clenching or Grinding (Bruxism)

Habitual clenching strains tooth ligaments, causing soreness when biting.

A custom nightguard or behavioral strategies can relieve pressure and prevent cracks.

9. Gum Disease or Recession

When gums recede, the roots become exposed and sensitive. Gum inflammation or bone loss can also make teeth feel sore when you chew.

Professional cleanings and periodontal therapy can help restore gum health.

10. A Failed Root Canal

If you’ve had a root canal on that tooth, it’s possible that infection has returned or a canal was missed.

Our specialists perform endodontic treatment and retreatment, as well as apicoectomy surgery using advanced imaging to locate hidden infection and relieve pain.

When to See an Endodontist

If chewing pain lasts more than a couple of days or worsens with pressure, temperature, or swelling, it’s time to call a professional.

Your endodontist can identify whether the issue lies in the pulp, root, or surrounding bone — and offer targeted treatment to preserve your natural tooth.

Get Relief with Ballantyne Endodontics

You don’t have to live with pain every time you chew. At Ballantyne Endodontics, our Charlotte-based team uses advanced imaging and microsurgical technology to pinpoint the cause of discomfort and provide lasting relief.

Whether it’s a cracked tooth, infection, or previous root canal issue, we can help you save your tooth and restore comfort.

Schedule your consultation or request a referral from your dentist today.

FAQs About Tooth Pain When Chewing

Why does my tooth hurt only when I bite down?

Pain when biting typically means the tooth or surrounding structures are stressed — from cracks, infections, or uneven bite forces.

Can a root canal fix chewing pain?

Yes. If infection or inflammation is inside the tooth, root canal therapy removes the damaged tissue and stops pain at the source.

Should I see a general dentist or an endodontist first?

Start with your dentist for an exam. If the pain involves deep tooth structure or prior root canal work, an endodontist offers specialized treatment.