Jaw pain most often comes from tension in the chewing muscles or irritation of the temporomandibular joint (TMJ), the hinge that connects your lower jaw to your skull. About 5% of U.S. adults experience significant jaw or face pain in any given three-month period, and it’s at least twice as common in women as in men. The cause can range from something as simple as nighttime teeth grinding to a dental infection or, rarely, a sign of a heart problem.
Temporomandibular Disorders (TMD)
TMD is an umbrella term for more than 30 conditions affecting the jaw joint and the muscles that control chewing. Pain in those muscles or the joint itself is the most common symptom, but TMD can also cause pain that spreads into the face and neck, jaw stiffness, ringing in the ears, dizziness, and a feeling that your bite has shifted. Clicking or popping sounds in the joint without pain are normal and don’t need treatment.
In most cases, no single clear cause is identified. A direct injury to the jaw can trigger TMD, but more often it develops from a combination of genetic factors, stress, and individual differences in how the brain processes pain. Contrary to a persistent belief, research does not support the idea that a bad bite or orthodontic braces cause TMD. The condition peaks between ages 35 and 54 and becomes less common after 65.
Teeth Grinding and Clenching
Bruxism, the habit of grinding or clenching your teeth, is one of the most frequent drivers of jaw pain. Many people do it in their sleep and have no idea until symptoms appear: a tired or tight jaw in the morning, a jaw that won’t open all the way, or visibly enlarged jaw muscles on either side of the face. Over time, bruxism can flatten, chip, or fracture teeth and wear through enamel, exposing the sensitive layers underneath. It can also damage dental work like crowns and fillings.
Stress is a major trigger. When you’re under chronic pressure, your body’s fight-or-flight response keeps your jaw muscles tensed, often without you noticing. Cortisol, the hormone released during stress, also increases inflammation in muscles and joints, compounding the problem. If you wake up with a sore jaw or catch yourself clenching during the day, stress is a likely contributor.
Dental Infections and Wisdom Teeth
A tooth abscess, a pocket of infection at the root of a tooth, produces a severe, constant, throbbing toothache that can radiate into the jawbone, neck, or ear. You may notice swelling in your face or cheek, tender lymph nodes under the jaw, or difficulty swallowing. Bacteria enter the tooth through a deep cavity, chip, or crack and trigger infection deep inside.
If an abscess doesn’t drain, the infection can spread into the jaw and surrounding tissues. This is one of the few causes of jaw pain that requires prompt professional treatment, because untreated dental infections can become serious quickly. Impacted wisdom teeth can produce similar symptoms: pressure, swelling, and aching along the back of the jaw where the tooth is trying (and failing) to emerge.
Arthritis in the Jaw Joint
The TMJ is a true joint, and like knees or knuckles, it can develop arthritis. Osteoarthritis causes a grinding sensation (called crepitus) when you open and close your mouth, resulting from breakdown of the cartilage surfaces inside the joint. Rheumatoid arthritis can also target the TMJ, causing inflammation along the tendons and making it painful or difficult to open your mouth. If you already have an inflammatory arthritis diagnosis and notice new jaw symptoms, imaging can reveal whether the joint is affected.
When Jaw Pain Signals a Heart Problem
Pain from a heart attack can radiate to the jaw and teeth. The key differences: cardiac jaw pain typically comes on suddenly, may affect both sides or the lower jaw specifically, and occurs alongside other symptoms like chest pressure, shortness of breath, weakness, nausea, or vomiting. Musculoskeletal jaw pain, by contrast, tends to worsen with chewing or jaw movement, is often one-sided, and doesn’t come with chest symptoms. If jaw pain appears suddenly with any combination of those other warning signs, treat it as a medical emergency.
How TMD Is Diagnosed
Diagnosis starts with a physical exam. A provider will press on your jaw muscles and the joint itself to check for tenderness, ask you to open and close your mouth while watching for asymmetry in movement, and measure how wide you can open. Decreased range of motion, clicking with pain, or a jaw that locks (can’t fully open because a disc inside the joint is blocking normal movement) all point toward TMD. Tenderness in the neck and shoulder muscles is also common and often evaluated at the same time, since tension in those areas feeds into jaw pain.
At-Home Relief That Works
Short-term use of over-the-counter anti-inflammatory pain relievers like ibuprofen can provide temporary relief from jaw muscle soreness and joint inflammation. Applying moist heat or a cold pack to the side of your face for 15 to 20 minutes can also help, with heat being better for chronic muscle tightness and cold better for acute flare-ups.
A structured jaw exercise program can make a real difference. Kaiser Permanente recommends performing six repetitions of each exercise, six times a day, spaced throughout the day. The core exercises include:
- Tongue rest position: Let your teeth sit slightly apart with your tongue resting on the roof of your mouth. This trains your jaw’s default resting posture and reduces baseline tension.
- Controlled opening: With your tongue on the roof of your mouth and fingertips on the jaw joints, open your mouth as far as you can without the tongue dropping. Use a mirror to make sure your jaw opens straight, not drifting left or right.
- Isometric stabilization: With teeth slightly apart, use your hand to push gently against the side and bottom of your jaw while resisting the movement. Hold each direction for five seconds. This strengthens the muscles that stabilize the joint.
- Resisted opening: Rest your chin on your fist and slowly open against the resistance, keeping your tongue on the roof of your mouth and jaw tracking straight.
- Posture correction: Tuck your chin, then pull your shoulder blades together and down. Hold for five seconds. Forward head posture contributes to jaw tension more than most people realize.
If any exercise increases your pain, reduce the intensity or number of repetitions. The goal is gradual improvement, not pushing through discomfort.
Reducing Nighttime Clenching
If you suspect you’re grinding at night, a bite guard worn during sleep can protect your teeth and reduce the load on your jaw muscles and joint. Over-the-counter versions exist, but a custom-fitted guard from a dentist typically provides better comfort and protection. Beyond the guard itself, managing the underlying stress through regular exercise, sleep hygiene, or relaxation techniques before bed helps address the root trigger. Many people notice their jaw pain improves significantly once they start wearing a guard consistently, even before making other changes.