Why Does It Hurt to Chew? What Might Be Causing It — and What You Can Do

May 28, 2022 · Ashely Notarmaso

Editor’s Note: This article has been updated on September 7, 2025 with the latest insights across TMJ, dental issues, and Sentinel mouthguard solutions to help you chew comfortably again.

Quick Takeaway

Pain while chewing usually stems from underlying dental problems or jaw mechanics—not just “random soreness.” It might be caused by tooth issues, TMJ strain, gum problems, or sinus irritation. Sentinel breaks this down and guides you toward relief, including how a custom night guard can ease jaw tension and protect your smile.

Most Common Reasons Chewing Hurts

Let's talk through the usual suspects:

• Tooth Problems: Cavities, cracked teeth, or misaligned crowns can make every bite feel painful—especially if the surface isn’t even or there's pressure buildup.

• TMJ Disorder or Bite Mechanics: If your jaw joint isn't aligning properly, chewing can overload that hinge, leading to pain or joint inflammation. Sleep grinding (bruxism) often worsens it, and wearing a mouthguard at night can offer relief. 

• Dental Abscess: Infected teeth (often near the roots) may hurt when chewing or pressure is applied. Treatment—including root canals—typically resolves this.

• Gum Disease or Gum Irritation: Infection or inflammation in the gums affects chewing comfort and can be worsened by grinding and misalignment.

• Sinus Issues or Referred Pain: Congestion or pressure in your sinuses can sometimes present as jaw or tooth pain, especially when chewing

This article is part of our Jaw & Teeth Grinding Pain: Complete Guide to Relief and Prevention, where we cover common issues like TMJ, ear pain, headaches, and more—plus practical solutions to help you feel better.

TMJ & Jaw Mechanics: Why a Stiff Jaw Hurts

Your jaw connects to your skull through extremely sensitive hinge-like joints (TMJs). Factors like grinding, stress, or misaligned bites can irritate them, making chewing painful. Custom night guards help reduce that strain over time.

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What the Experts Say

• The Cleveland Clinic confirms that pain when eating may point to TMJ issues or persistent bruxism. Cleveland Clinic
• The Mayo Clinic recommends self-care (heat, ice, avoiding habits like chewing gum), physical therapy, and oral splints for managing TMJ discomfort. If home care fails, they suggest exploring other treatments like mouthguards or therapies. Mayo Clinic

How to Find Relief: Steps You Can Take Now

Here are practical steps tailored to your situation:

1. See Your Dentist First
   Rule out dental issues like cavities, cracked crowns, or abscesses—these often require timely intervention.

2. Support Your Jaw with a Night Guard
   A well-fitting, custom-made guard helps reduce tension during sleep and protects your enamel.

3. Practice Jaw Self-Care
   Gentle heat, scissor-like jaw stretches, and avoiding gum or ice can reduce strain. Consider guided TMJ massage too. 

4. Watch Your Habits
   Avoid chewing pens or ice. Sleep posture, stress management, and consistent routines all support jaw health.

5. Address Sinus or Gum Health
   If sinus pressure or gum tenderness is at play, talk to the appropriate specialist to alleviate underlying issues.

Why Sentinel’s Custom Night Guards Help

Our lab-crafted night guards are tailored to the nuances of your bite—unlike one-size OTC versions. They:

• Distribute pressure evenly

• Relieve joint strain

• Shield softer tissues

• Preserve worn or sensitive enamel

They’re your best bet for both protection and comfort.

When to Get Professional Help

Consult a dentist or TMJ specialist if you experience: