Why Does My Head and Teeth Hurt? Possible Causes

Head pain and tooth pain showing up together usually traces back to the trigeminal nerve, a large nerve that branches across your face, jaw, and scalp and carries sensation from your teeth, sinuses, temples, and forehead to your brain. Because so many structures share this single nerve highway, a problem in one area can produce pain that feels like it’s coming from another. The overlap is so common that distinguishing the true source often requires checking off several possibilities, from everyday causes like sinus congestion and teeth grinding to less obvious ones like jaw joint problems, certain medications, and even cardiac events.

The Shared Wiring That Makes These Pains Overlap

Your teeth, gums, jaw muscles, sinuses, and much of your scalp all feed pain signals into branches of the trigeminal nerve. Sensory fibers from this nerve enter the brainstem and descend into the upper spinal cord, where they mingle with nerve fibers arriving from the upper neck. That shared column of nerve tissue is why a toothache can trigger a headache, a headache can feel like a toothache, and neck tension can produce pain in both places at once.¹ When pain signals persist long enough, the nerve pathways themselves become more excitable, a process called central sensitization. Once that happens, even mild stimuli in one branch of the trigeminal system can amplify pain across neighboring branches, making it harder to tell where the problem actually started.

Sinus Infections and Congestion

The maxillary sinuses sit directly above the roots of your upper back teeth. When those sinuses swell from a cold, allergies, or a bacterial infection, the pressure pushes down onto those tooth roots and radiates into your forehead and cheeks. The giveaway is that the pain worsens when you bend forward, feels dull and constant rather than sharp, and usually affects several upper teeth on one or both sides rather than a single tooth. You might also notice nasal congestion, post-nasal drip, or a reduced sense of smell. Over-the-counter decongestants and steam inhalation often bring relief within a few days, though a bacterial sinus infection may need antibiotics.

One important distinction: a single tooth that’s severely infected can push bacteria upward into the sinus, creating a dental-origin sinus infection. If you’ve had lingering pain around one specific upper molar along with sinus symptoms, a dentist may need to evaluate that tooth before sinus treatment alone will help.

Teeth Grinding and Jaw Clenching

Bruxism, the habit of grinding or clenching your teeth, is one of the most common reasons head and tooth pain show up as a package. Many people grind in their sleep without knowing it. The sustained muscle contraction overloads the jaw muscles and the muscles at your temples, producing a dull, band-like headache that is often worst in the morning. At the same time, the mechanical pressure wears on tooth enamel and compresses the ligaments around tooth roots, leaving teeth sore or sensitive.

Stress and anxiety are the most recognized triggers, but certain medications can bring on or worsen bruxism. Selective serotonin reuptake inhibitors like fluoxetine and sertraline have been linked to increased nighttime grinding. One study found that roughly nine out of ten patients taking SSRIs showed higher bruxism scores within two weeks of starting the medication.² A systematic review of published case reports found that symptoms could begin within three to four weeks of starting the antidepressant and often resolved within a similar window after the drug was stopped, buspirone was added, or the medication was switched.³ If you recently started an antidepressant and notice new jaw soreness or morning headaches, mentioning it to your prescriber is worthwhile.

Temporomandibular Joint Disorders

The temporomandibular joint (TMJ) is the hinge just in front of each ear. When the joint or the muscles that control it become inflamed or misaligned, the result is pain that can radiate into the teeth, temples, and sometimes the back of the head. You may notice clicking or popping when you open your mouth, difficulty chewing, or a jaw that temporarily locks.

Research shows a strong overlap between TMJ-related disorders and headache. A study comparing headache patients with headache-free controls found that a significantly higher proportion of headache patients met the diagnostic criteria for myofascial pain in the jaw muscles. Headache patients also reported more frequent tooth contact during the day, greater masticatory muscle tension, and more stress than controls. The overlap was so substantial that the researchers described headache and TMJ disorder populations as nearly interchangeable in terms of oral habits and symptoms.⁴ In practical terms, if you have chronic headaches that don’t respond to typical headache remedies, a jaw evaluation is worth pursuing, and vice versa.

Dental Infections and Cavities

An abscessed tooth, deep cavity, or cracked tooth can generate pain intense enough to radiate well beyond the mouth. The infection produces inflammation at the tooth root, which activates the trigeminal nerve branches in that area and can send referred pain into the temple, eye socket, or ear on the same side. Unlike sinus pain, dental pain tends to localize more sharply to one tooth or a small cluster, often worsens with hot or cold food, and may come with visible swelling of the gum. Left untreated, a dental abscess can spread to the jaw bone or even into deeper tissue planes of the neck and head, which is a medical emergency.

Wisdom teeth deserve a separate mention. When a third molar is partially erupted or impacted, the surrounding tissue can become inflamed or infected, producing pain that radiates into the ear, temple, and back of the jaw. Because the wisdom teeth sit so far back, people sometimes mistake the pain for an earache or tension headache rather than a dental problem.

Cluster Headache Mimicking Toothache

Cluster headaches are intensely painful attacks, typically concentrated around one eye or temple, that last anywhere from fifteen minutes to three hours. What surprises many people is that cluster headaches can present primarily as dental or mid-face pain. In clinical orofacial pain practice, patients with cluster headaches have shown up with dental or midfacial complaints as their main concern rather than a headache complaint.⁵ The pain is always one-sided and tends to recur at the same time of day, often waking people from sleep. It’s frequently accompanied by a watery or red eye, nasal congestion, or a drooping eyelid on the affected side. Recognizing this pattern matters because cluster headache responds to specific treatments that are completely different from dental treatment, and unnecessary dental work on a tooth that is actually healthy is a real risk when the headache is misdiagnosed.

Migraine and Other Primary Headaches

Migraine can also cause tooth and jaw pain that feels genuinely dental. The trigeminal nerve is central to the migraine process, and during an attack, pain can radiate into the upper or lower teeth, the cheek, or the jaw. Some migraine sufferers report tooth sensitivity or facial pressure as early warning signs before the full headache hits. Tension-type headaches, though less dramatic, can produce bilateral temple pressure alongside jaw muscle soreness, especially in people who unconsciously clench their jaw during stress. The key clue that a primary headache disorder is behind the tooth pain is timing: the tooth symptoms come and go with the headache episodes rather than persisting between attacks.

Giant Cell Arteritis

For anyone over 50 experiencing a new headache alongside jaw pain, giant cell arteritis should be on the radar. This is an inflammatory condition of the blood vessels, most commonly affecting the arteries at the temples and scalp. The hallmark is a new, persistent headache in an older adult, often with pain in the jaw that worsens with chewing. It predominantly affects women and usually appears after age 60.⁶ The most serious complication is irreversible vision loss, which can occur if inflammation narrows the arteries supplying the eyes.

This condition rarely occurs in people younger than 50. The most common presenting symptoms are headache, jaw claudication (pain when chewing that eases when you stop), polymyalgia, and visual changes.⁷ A blood test measuring markers of inflammation can raise suspicion, and treatment with corticosteroids typically needs to begin quickly to protect vision. If you’re over 50 with new scalp tenderness, jaw pain while eating, and headache, this is not a wait-and-see situation.

Cardiac Referred Pain

This one catches people off guard: heart problems can cause pain in the jaw and teeth. During a cardiac event like angina or a heart attack, pain signals from the heart travel along the vagus nerve and can be referred to the neck, jaw, throat, and even the teeth. A prospective multicenter study found that about 6 percent of patients experiencing heart-related ischemia had craniofacial pain as their only symptom, and another 32 percent had craniofacial pain alongside chest or arm pain. The most common facial pain locations were the throat, the left jaw, the right jaw, the TMJ/ear area, and the teeth.⁸

When craniofacial pain is the sole sign of reduced blood flow to the heart, failure to recognize the cardiac source can be dangerous.⁹ If tooth or jaw pain comes on suddenly during physical exertion, is accompanied by shortness of breath or sweating, or doesn’t fit any dental cause, treat it as a potential cardiac event and seek emergency care. This is especially true if you have risk factors for heart disease.

Pressure-Related Tooth and Head Pain

Rapid changes in ambient pressure can produce simultaneous tooth and head pain, a condition broadly called barodontalgia. Scuba divers, frequent flyers, and people undergoing hyperbaric oxygen therapy are the most affected groups.¹⁰ The pressure change can aggravate existing dental issues that you might not have noticed on the ground. A review of in-flight dental pain found that the most common underlying causes were faulty dental restorations and cavities without pulp involvement (together about 29 percent), followed by dead pulp tissue with periapical inflammation (about 28 percent), and vital pulp disease (about 14 percent). Sinus inflammation triggered by pressure changes accounted for about 10 percent of cases.¹¹ Anyone who experiences recurrent tooth pain during flights or dives should see a dentist before the next trip, because the pressure change is unmasking a dental problem that exists all the time.

Phantom Tooth Pain and Persistent Idiopathic Facial Pain

Sometimes tooth pain persists even after the tooth has been treated with a root canal or extracted entirely. This phenomenon, called phantom tooth pain, is a neuropathic pain condition thought to arise from damage to the nerve during a dental procedure. The pain extends into the facial tissues adjacent to the treated or missing tooth and can trigger headaches through the trigeminal sensitization process described earlier.¹² Importantly, research has not found a specific personality type that predisposes someone to phantom tooth pain; it is a nerve-based problem rather than a psychological one.

A related scenario is persistent orofacial pain with no identifiable dental or structural cause. When thorough examination rules out infection, inflammation, and structural damage, a neuropathic change in the trigeminal nerve itself may be responsible.¹³ These cases are frustrating because the pain feels convincingly dental, which can lead to repeated dental procedures that don’t help. Treatment for neuropathic facial pain often involves medications used for nerve pain rather than further dental work.

Intracranial Tumors Presenting as Dental Pain

Rare but worth knowing about: tumors inside the skull can press on or irritate the trigeminal nerve and produce pain that mimics common dental conditions. A literature review identified 28 cases of patients who initially presented to dental professionals with orofacial pain caused by intracranial tumors. The pain mimicked trigeminal neuralgia, persistent idiopathic facial pain, or TMJ disorders. About 59 percent of those patients had some sensory or motor function loss at the time of diagnosis.¹⁴ Numbness or tingling in the face, weakness in the chewing muscles, or pain that steadily worsens over weeks without a clear dental cause are signs that imaging of the head may be warranted.

When to Worry and What to Tell Your Doctor or Dentist

Most combined head-and-tooth pain has a benign cause, but certain patterns signal that something more serious may be going on. A useful screening framework used in headache medicine is the SNOOP mnemonic: systemic symptoms or disease, neurologic signs, sudden onset, onset after age 40, and pattern change from prior headaches.¹⁵ Any of these features in the context of head and tooth pain warrants prompt medical evaluation rather than a wait-and-see approach.

Specific red flags to watch for include:

• Sudden, severe onset: Pain that peaks within seconds to minutes, especially during exertion, could point to a vascular emergency.
• Numbness or weakness: Facial numbness, difficulty moving the jaw, or a drooping eyelid suggests nerve involvement beyond a simple toothache.
• Vision changes: Blurred vision or vision loss alongside temple pain in someone over 50 raises concern for giant cell arteritis.
• Chest tightness or shortness of breath: Jaw pain paired with these symptoms may indicate a cardiac event.
• Fever and swelling: Spreading facial swelling, difficulty swallowing, or fever in the context of dental pain may mean a spreading infection.

The Diagnostic Merry-Go-Round

One of the most frustrating aspects of overlapping head and tooth pain is the diagnostic journey. Because the pain often feels convincingly dental, many people see a dentist first. If the dentist doesn’t find an obvious cause but the patient insists the tooth hurts, there can be pressure on both sides to try a dental procedure anyway. Researchers have flagged this pattern explicitly: patients with facial pain syndromes often consult dentists first, and unnecessary dental interventions sometimes follow even when no dental cause is found. After dental treatment fails, the patient may bounce to another dentist, then to an oral pain specialist, and eventually to a neurologist, though neurologists are also often unfamiliar with chronic orofacial pain conditions.¹⁶

If your dentist examines you thoroughly and finds nothing wrong, that’s actually valuable information. Rather than pushing for a root canal or extraction on a tooth that tests healthy, the more productive step is to pursue a broader evaluation. The causes listed above, from TMJ disorders and bruxism to cluster headaches, neuropathic pain, and even cardiac referral, all produce pain that is indistinguishable from a dental problem based on the patient’s description alone. Getting the right diagnosis sometimes requires imaging, blood work, a sleep study for bruxism, or a neurological exam, depending on what the pattern of symptoms suggests.

Salivary Gland Stones

A less commonly discussed source of jaw and face pain is a salivary gland stone, or sialolith. These small calcium deposits form inside the ducts of the salivary glands, most commonly the submandibular gland beneath the jaw. When a stone partially blocks the duct, saliva builds up behind it, causing swelling and pain that tends to spike around mealtimes, exactly when saliva production increases. The swelling and pain are centered under the jaw or in the floor of the mouth, but they can radiate into nearby teeth and the side of the head. A review of 180 patients found that the submandibular gland was the most commonly affected, with symptoms of recurrent pain and swelling sometimes stretching back years before diagnosis.¹⁷ Small stones sometimes pass on their own with hydration and gentle massage; larger ones may need to be removed by a specialist.