Why Does My Neck and Jaw Hurt? Common Causes

Neck and jaw pain showing up together is not a coincidence. The two regions share muscles, nerves, and connective tissue so intimately that a problem in one area routinely produces symptoms in the other. The most common culprit is a temporomandibular disorder, but the list of possibilities runs from teeth grinding and poor posture to rare but serious conditions like heart disease. Understanding which pattern fits your symptoms can help you figure out when to wait it out and when to get help fast.

Temporomandibular Disorders Are the Leading Cause

Temporomandibular disorders, usually called TMD, involve the jaw joint itself, the muscles that move the jaw, or both. If you feel an ache around the hinge of your jaw that also radiates into your neck, TMD is the first thing most clinicians will consider. The overlap is remarkably consistent: one study found that about 59% of people with TMD had some degree of neck muscle pain, and pain severity in the neck tracked directly with how severe the jaw disorder was.

Research confirms this is not just a loose association. In a study comparing jaw disability scores with neck disability scores, the correlation was extremely high, with jaw disability explaining roughly 82% of neck disability in that population.¹ In other words, people with healthy jaws almost always had healthy necks, and people with significant jaw trouble almost always had significant neck trouble.

TMD covers a broad range of problems. You might have a displaced disc inside the joint that clicks or catches when you open your mouth. You might have myofascial pain, where the muscles of chewing become tight and tender and refer pain into the temples, ears, and neck. Or you might have degenerative changes in the joint itself. All of these can drive neck pain through shared muscle tension and nerve pathways.

Why the Neck and Jaw Are Wired Together

The reason neck trouble so reliably produces jaw pain and vice versa comes down to how nerves in the upper spine converge. Sensory information from the face travels through the trigeminal nerve, while sensory signals from the upper neck travel through the first few cervical nerves. These nerve roots feed into overlapping areas of the brainstem, which means the brain sometimes struggles to tell them apart. Researchers call this nociceptive convergence. In an experimental demonstration of this phenomenon, sterile water injected near the greater occipital nerve at the back of the neck produced intense pain that subjects felt in areas served by the trigeminal nerve, including the face and jaw.² The brain received a signal from the neck and projected it onto the jaw.

This convergence also works in the other direction. Dental problems that seem entirely local to the mouth can generate neck pain without the tooth area itself hurting. A published case report described a man with chronic neck pain that resisted every treatment until clinicians discovered his partially impacted wisdom teeth were the source. The pain was traveling through the trigeminal nerve’s lower nucleus, which extends into the upper cervical spinal cord, and emerging as neck symptoms.³ Removing the wisdom teeth resolved the neck pain.

Bruxism and Clenching

Grinding your teeth at night or clenching during the day is one of the most common drivers of combined neck and jaw pain. Bruxism forces the jaw muscles to work for hours at loads far beyond normal chewing, and because many of those muscles attach to or interact with neck structures, the strain migrates upward. A controlled study found that the odds of someone with myofascial jaw pain also having cervical muscle pain were roughly two to three times higher than in people without jaw pain, and bruxism was a significant concurrent finding.⁴

Many people who clench do not realize they are doing it. Daytime clenching often happens during concentration, driving, or stress, and sleep bruxism by definition occurs outside conscious awareness. Waking up with a stiff jaw, sore temples, and an aching neck is a classic combination. A bed partner who hears grinding sounds at night is a strong clue, but plenty of people clench silently without noticeable tooth-on-tooth noise.

Posture, Screens, and Forward Head Position

The way you hold your head changes how your jaw works. When you open your mouth, your head naturally tilts backward slightly to make room for the mandible to drop. A study tracking three-dimensional head and jaw movement found that during a full mouth opening, the head extended an average of about 8 degrees, with some individuals extending more than 20 degrees.⁵ When you start from a slumped position, this coordination breaks down, forcing the jaw muscles and neck muscles to compensate in ways that can generate pain over time.

Prolonged smartphone use is emerging as a specific risk factor. Looking down at a phone pushes the head forward and loads the cervical spine with extra force, and recent research ties this directly to jaw symptoms. A study of university students found that smartphone addiction scores correlated with both neck disability and jaw pain.⁶ Another study noted that students using smartphones more than six hours a day had the highest TMD severity scores, and both usage duration and addiction level predicted jaw problems independently.⁷

Certain phone postures are worse than others. Lying on your side with your head bent away from the screen places asymmetric pressure on head and neck muscles and increases loading on one side of the jaw joint. Lying on your back with your chin pushed toward your chest is also harmful. Sustained head-craning during any kind of screen use ramps up tension in both the cervical and chewing muscles.⁸ The fix is unglamorous but effective: hold the phone closer to eye level, take breaks, and avoid marathon scrolling sessions in bed.

Stress, Anxiety, and Central Sensitization

Psychological stress is a well-established contributor to TMD and to the neck pain that accompanies it. Stress raises muscle tension in the jaw and neck, encourages clenching, and disrupts sleep. But the connection goes deeper than just tight muscles. Chronic stress, anxiety, and depression can sensitize the pain-processing centers in the brain, making normal sensory input from the jaw and neck feel amplified and more painful than it should be.⁹ A systematic review and meta-analysis confirmed that stress increases both the development and severity of TMD.¹⁰

When central sensitization sets in, the nervous system essentially turns up the volume on pain signals. People in this state often have jaw pain accompanied by chronic neck pain, poor sleep, and difficulty tolerating stress.¹¹ If your neck and jaw pain seem disproportionate to any injury you can identify, and they are accompanied by fatigue, headaches, and emotional distress, central sensitization may be part of the picture. This does not mean the pain is “all in your head.” The nervous system changes are real and measurable, and they respond to treatments that address the nervous system directly, such as cognitive behavioral therapy, graded exercise, and stress management.

Whiplash and Traumatic Injury

A whiplash injury from a car accident or fall is one of the clearest triggers for combined neck and jaw pain. The sudden back-and-forth motion strains cervical muscles and ligaments, but it also jerks the jaw open, overloads the TMJ, and damages the muscles of mastication. A study comparing people who had recently sustained whiplash with uninjured controls found dramatically higher odds of jaw pain and dysfunction in the whiplash group, with odds ratios ranging from about 6 to 41 depending on the specific symptom measured. Neck pain intensity in the acute phase after whiplash correlated moderately with jaw pain, suggesting that severe early neck symptoms may be a risk factor for developing chronic jaw pain later on.¹²

If your neck and jaw symptoms started after some kind of impact or sudden movement, mention the timeline to your clinician. Jaw involvement after whiplash is frequently overlooked because the focus tends to fall entirely on the cervical spine.

When Jaw and Neck Pain Signal a Heart Problem

This is the scenario nobody wants but everyone should know about. Heart attacks and angina episodes do not always announce themselves with crushing chest pain. Sometimes the pain shows up in the jaw, the neck, or the throat, with little or no chest discomfort at all. In a prospective multicenter study, about 6% of patients experiencing cardiac ischemia reported craniofacial pain as their only symptom, including three patients who were having an actual heart attack. Another 32% had craniofacial pain alongside chest pain, with the throat, left jaw, and ear region being the most common facial locations.¹³

A separate study of nearly 300 patients with ischemic heart disease found that craniofacial pain occurred in about 18% of them. The most common sites were the back of the neck and the head, followed by the throat and anterior neck. Pain in the left jaw was reported by roughly 28% of those who experienced facial pain.¹⁴ Cardiac jaw pain tends to feel like pressure or tightness rather than a sharp, localized ache. It may come on during exertion or emotional stress, and it usually involves more than one spot, often the jaw plus the throat, arm, or chest.¹⁵

The bottom-line rule: if your neck and jaw pain comes on suddenly, especially during physical activity, is accompanied by shortness of breath, sweating, nausea, or a feeling of pressure spreading across the chest or arms, treat it as a potential cardiac emergency. This is especially true for people over 50, those with known heart disease risk factors, and women, who are more likely than men to have atypical presentations of heart attacks.

Giant Cell Arteritis

Giant cell arteritis is an inflammatory condition of blood vessels that mostly affects people over 50. It can cause jaw pain that worsens with chewing, often called jaw claudication, along with headaches, scalp tenderness, and neck stiffness. The jaw pain typically feels like fatigue or cramping in the chewing muscles rather than joint pain, and it gets worse the longer you chew. Some patients also report ear pain, facial numbness, and tongue swelling.¹⁶ A case report described a patient who had jaw claudication, headache, and joint stiffness persisting over six months before diagnosis.¹⁷

Giant cell arteritis needs prompt treatment because untreated inflammation can damage the arteries supplying the eyes, leading to permanent vision loss. If you are over 50 and notice jaw fatigue during meals combined with a new headache pattern, see a doctor soon. A blood test measuring inflammatory markers is usually the first screening step.

Salivary Gland Stones

A salivary stone lodged in the duct of the submandibular gland can produce pain and swelling under the jaw that mimics a neck or jaw problem. The submandibular glands sit just below and behind the lower jawbone, so when one becomes blocked, the resulting swelling and pain can spread into the neck and jaw angle. The hallmark symptom is pain that spikes during or just after eating, when the gland tries to secrete saliva against the obstruction.¹⁸ If your neck and jaw pain reliably worsens at mealtimes and you can feel a firm lump under your jaw, a salivary stone is worth investigating. Small stones sometimes pass on their own with hydration and gentle massage, but larger ones may need to be removed.

Sleep Apnea and Nighttime Jaw Strain

Obstructive sleep apnea and TMD frequently coexist, and the relationship appears to go beyond coincidence. Sleep apnea involves repeated airway collapse during sleep, which triggers arousals that disrupt muscle tone and often provoke bruxism. A follow-up study tracking patients with moderate and severe sleep apnea found that the severity of their apnea correlated with jaw joint changes, higher tooth wear, and increased pain scores over time.¹⁹ If you snore heavily, wake up feeling unrested, and also have morning jaw and neck pain, the two problems may be feeding each other.

Medication-Related Jaw and Neck Symptoms

Certain medications can cause involuntary muscle spasms in the head and neck that produce sudden jaw clenching, neck stiffness, or both. These are called drug-induced dystonias, and they have been reported with antipsychotics, anti-nausea drugs, and even some antidepressants. A case report documented acute dystonia involving the head and neck muscles after bupropion use, with jaw clenching and TMJ-like symptoms as features.²⁰ If your jaw and neck pain started shortly after beginning a new medication, bring that up with your prescriber.

Treatment Approaches That Address Both Regions

Because the neck and jaw are so tightly linked, treating one without addressing the other often leaves symptoms partly unresolved. A randomized controlled trial found that an eight-week program of neck-targeted exercises improved not only neck pain but also jaw function and oral health-related quality of life in women with TMD. The neck exercises outperformed a placebo for pain and jaw function, and they outperformed manual therapy for quality of life.²¹ A systematic review and meta-analysis found that manual therapy alone or combined with jaw and cervical exercises showed promising effects for TMD, though effect sizes were generally low to moderate and no single approach was clearly superior.²²

Occlusal splints, sometimes called night guards, are another common intervention. They work by distributing bite forces evenly and relaxing the jaw-elevating muscles. In a follow-up study, patients using a soft occlusal splint saw reductions in facial pain and TMJ symptoms, and patients who had cervical muscle pain also improved, suggesting that the referred pain from the jaw area was easing.²³ A separate study specifically examining relaxation splints in patients with TMD and neck pain found that the splint reduced chronic cervical spine pain.²⁴

Swollen Lymph Nodes and Infections

Infections in the mouth, throat, or ears can cause lymph nodes under the jaw and along the sides of the neck to swell and become tender. This is one of the most common reasons for sudden-onset neck and jaw pain in younger, otherwise healthy people. An upper respiratory infection, a dental abscess, or a bad sore throat can all trigger it. The pain usually resolves as the infection clears, but persistently swollen or painless lymph nodes in the submandibular area deserve medical evaluation, since those locations can occasionally signal something more serious. If your neck and jaw pain is accompanied by fever, difficulty swallowing, or visible swelling that has been growing for more than two weeks, see a clinician rather than waiting it out.