How can bruxism cause headaches? Bruxism causes morning, tension, and migraine headaches via jaw muscle fatigue and trigeminal sensitization. Learn the types, triggers, and relief options.
Written by Ann C. McCulloch, MBA | Medically Reviewed by Bradley Allen Eli, DMD, MS
A TMJ flare-up is an episode in which temporomandibular joint symptoms suddenly appear for the first time or, more commonly, when existing symptoms sharply worsen. Whether the underlying driver is joint inflammation (intra-articular) or masticatory muscle dysfunction (myofascial), flare-ups respond best to fast, targeted treatment — because in TMJ disorders, untreated pain tends to amplify itself over time. Identifying which type of TMD you have is the critical first step toward shortening a flare-up and preventing the next one.
The causes of a TMJ flare-up can be as mysterious as the origin of temporomandibular disorders (TMDs) themselves, but the type of TMD a person has can offer important clues. The two fundamental categories are disorders related to the joint itself (“intra-articular” disorders) and those related to the muscles and tissues surrounding the joint (“myofascial” pain disorders).
How can you tell the difference? Generally, when there is joint clicking, popping, or cracking sounds and point tenderness directly over the joint, the problem is intra-articular. Alternatively, when there is diffuse facial pain, muscle tenderness, or headache symptoms, the problem is more likely a myofascial disorder. That said, a complete medical workup is usually needed to precisely identify the underlying condition if symptoms do not improve within two weeks.
With intra-articular disorders, the driving mechanism is believed to be inflammation. Chemical markers of inflammation are present in the joint fluid of people with intra-articular TMDs, and inflammation of the joint lining — a process called “synovitis” — is observed in both traumatic and arthritic TMJ conditions. When people with intra-articular TMDs experience a flare-up, increased inflammation in the joint is the most probable cause. This is why physical trauma (such as jaw pain after a car accident or a direct blow to the jaw) is such a potent flare-up trigger for this group.
When TMJ pain originates from a myofascial disorder, the driving mechanism is less straightforward. “What we do know is that behaviors such as teeth grinding, jaw tension, stress, or increased exertion (gum chewing, for instance) can contribute to masticatory muscle pain and spasm. These are the likely culprits for TMJ flare up when the underlying disorder is myofascial,” explains Bradley Eli, DMD, MS, a specialist in orofacial pain and TMJ disorders.
Research confirms that stress and psychological strain play an especially significant role in myofascial flare-ups, both through direct muscle tension and by amplifying the nervous system’s sensitivity to pain. Understanding how TMJ and stress are connected is an important part of managing this subtype of the disorder.
Taking all of this into consideration, the following factors are among the most common inciting events for a flare-up. You can often identify the culprit by considering your recent history alongside the type of TMD you have.
The symptoms of a TMJ flare-up typically represent a worsening of already existing symptoms, but they can also manifest as new symptoms that you have not noticed before. The most common TMJ flare-up symptoms include:
It is worth noting that some of these symptoms — particularly headaches and ear pain — are frequently misattributed to other conditions. If you find that your headache pattern is intertwined with your jaw symptoms, our overview of migraine and jaw pain may help clarify what is driving your symptoms.
The length of a TMJ flare-up varies considerably from person to person, depending on the underlying condition and the specific inciting factor. Some flare-ups resolve within a few hours; others persist for days to weeks. The critical point is to begin treatment as early as possible, because with TMJ disorders, pain begets more pain.
When pain pathways become activated, the neurons involved grow increasingly hyperexcitable — a process known as central sensitization. This is sometimes described as “pain amplification,” and it was a central finding of the landmark OPPERA (Orofacial Pain Prospective Evaluation and Risk Assessment) study on chronic orofacial pain. In practical terms, this means that allowing a TMJ flare-up to go untreated does not simply prolong the episode — it can lower your pain threshold over time, making subsequent flare-ups more severe. A 2024 study published in the Journal of Oral Facial Pain and Headache confirmed that central sensitization is a measurable and clinically significant feature in a meaningful proportion of TMD patients, reinforcing the case for early intervention.
Treatment for TMJ flare-ups must be tailored to the type of underlying disorder. An optimal approach is multimodal — addressing pain, function, inflammation, and contributing habits simultaneously. The HEALS protocol provides a practical self-care framework:
All of the components of the HEALS protocol are included in the Speed2Treat® Home Healing Kit. Start your journey towards TMJ pain relief today!
The fastest relief typically comes from a combination of approaches applied simultaneously: take an over-the-counter NSAID (such as ibuprofen), apply alternating ice and heat to the jaw area in 10–15 minute cycles, switch immediately to a soft diet, and rest the jaw by keeping your teeth slightly apart and avoiding wide mouth opening. If you have an intraoral appliance, wearing it — even during the day — can reduce loading on the joint and provide faster relief.
Duration varies widely. Mild flare-ups triggered by a single event (such as a long dental appointment or eating a particularly hard food) may resolve within a few hours to a day or two. Moderate flare-ups often last several days to a week. Severe flare-ups, or those in patients with advanced intra-articular disease or significant central sensitization, can persist for two to four weeks or longer. Starting treatment early is the most reliable way to shorten the episode.
Yes — particularly in patients with myofascial TMD. Psychological stress increases masticatory muscle tension, promotes awake bruxism (involuntary daytime jaw clenching), and elevates systemic inflammatory markers. Any of these effects can independently trigger a flare-up in a sensitized jaw system. In people who have both a myofascial and an intra-articular component to their TMD, stress-driven bruxism can worsen inflammation in the joint as well.
During a flare-up, avoid anything that requires sustained or forceful chewing: hard foods (bagels, raw vegetables, nuts, hard candies), chewy foods (tough meats, gummy candies, dried fruit, chewy bread), and highly processed or high-sugar foods that promote inflammation. A temporary soft food diet — including yogurt, soft-cooked grains, smoothies, eggs, and steamed vegetables — reduces jaw loading and gives inflamed tissues time to recover.
Seek professional evaluation if your flare-up does not improve after two weeks of consistent self-care, if you are experiencing significant jaw locking or a sudden inability to open or close your mouth fully, if you have swelling that is visibly increasing, if you develop new neurological symptoms (numbness, facial weakness, or changes in hearing), or if pain is severe enough to interfere with eating or sleeping. Early diagnosis of the specific TMD subtype greatly improves treatment outcomes.
Yes — both are extremely common during a TMJ flare-up and are frequently misdiagnosed. The temporomandibular joint sits immediately in front of the ear canal, and inflammation or muscle tension in the surrounding area directly affects nearby auricular and tensor tympani muscles, producing dull, aching ear pain without any infection. Headaches during a flare — often described as intense, band-like pain — arise from masticatory muscle tension and trigeminal nerve sensitization, which also connects the jaw to head pain pathways.
