Pain when biting is one of those symptoms that can be surprisingly specific.
Your tooth may feel completely normal until you chew something in exactly the wrong spot.
There are several possible explanations.
A Cracked Tooth
Cracks are a common reason a tooth hurts when chewing.
When pressure is applied, portions of the tooth may flex microscopically around the crack and irritate the structures inside.
Some cracked teeth hurt particularly when releasing the bite.
Related: Cracked Tooth: Symptoms, Treatment, and When It Becomes an Emergency
A Cavity
Decay can weaken tooth structure and eventually irritate the nerve inside the tooth.
Not every cavity hurts, but deeper cavities may cause sensitivity or chewing discomfort.
Related: What Does a Cavity Feel Like? 7 Signs You May Have One
A Filling That’s Too High
If you recently had a filling or crown and the tooth suddenly hurts when biting, your bite may need to be evaluated.
Even a small difference in how the teeth contact can sometimes create significant discomfort.
A Dental Infection
Inflammation or infection around a tooth’s root can make the tooth sensitive to pressure.
Swelling, spontaneous pain, fever, or a bump on the gum can increase concern for infection.
Related: Dental Abscess: Symptoms You Shouldn’t Ignore
Food Trapped Between Teeth
Sometimes the tooth isn’t actually the primary problem.
Food repeatedly impacted between two teeth can inflame the surrounding gum tissue and create pain when chewing.
Should You Wait to See If It Goes Away?
Minor irritation sometimes resolves.
But pain that repeatedly occurs when biting, worsens, or is associated with temperature sensitivity or swelling deserves evaluation.
Frequently Asked Questions
Can a cracked tooth heal itself?
Enamel fractures generally do not biologically fuse back together.
Why does my tooth hurt only when I release my bite?
That pattern can sometimes occur with a cracked tooth, although an examination is needed to determine the cause.
Is biting pain an emergency?
Not always. Severe pain, swelling, trauma, or signs of infection make prompt evaluation more important.
The Bottom Line
A tooth that hurts when you bite is giving you useful information.
Rather than simply avoiding that side indefinitely, determining why the tooth hurts can help prevent a potentially manageable problem from becoming larger.
Chastain Dental Studio evaluates tooth pain and dental emergencies for patients throughout Chastain Park, Buckhead, Sandy Springs, and nearby Atlanta communities.
