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
Yes, an ear infection can cause jaw pain, most often through referred pain from shared nerve pathways between the ear and jaw. In rare cases, infection can spread directly from the ear into the temporomandibular joint (TMJ) itself. Distinguishing between the two matters, because the treatment for each is very different.
Jaw pain is a recognized feature of otitis externa. Because the ear canal sits so close to the TMJ, movement of the jaw joint — chewing, talking, or opening wide — can directly compress the inflamed canal, making jaw pain worse rather than just present. This is one reason jaw movement pain is often used as a clinical clue when evaluating outer ear infections.
Jaw pain is a less direct symptom of middle ear infections, but it can still occur. The ear and jaw share overlapping sensory innervation from several cranial nerves — the trigeminal, glossopharyngeal, and vagus nerves — which creates a pathway for pain signals from an inflamed middle ear to be perceived in the jaw region. There are also small anatomical passageways near the ear, including the petrotympanic fissure, that can, in rare cases, allow inflammation from the middle ear to spread toward the TMJ.
In rare cases, particularly in young children, a middle ear infection or mastoiditis can spread directly into the temporomandibular joint, causing septic arthritis of the TMJ. This presents with jaw pain, restricted mouth opening, and swelling in front of the ear. It’s uncommon, but the reason it’s taken seriously: case reviews have found that this complication carries a real risk of TMJ ankylosis, a stiffening or fusion of the joint, if not identified and treated promptly. Clinicians describe this as a genuinely rare but likely under-recognized complication, since the ear symptoms tend to overshadow the jaw involvement early on.
Distinguishing the two starts with a basic principle used in evaluating ear pain generally: pain that originates in the ear itself (primary otalgia) usually comes with visible signs on examination — redness, fluid, or swelling in the ear canal or eardrum. Pain that’s referred from somewhere else (secondary otalgia) typically shows a normal ear exam, and TMD and dental problems are the most common sources of that kind of referred pain.
“Most ear infections resolve without long-term problems, but persistent ear pain associated with jaw pain should not be ignored. In rare cases, infection can spread beyond the ear and involve the temporomandibular joint, making early diagnosis and appropriate treatment especially important,” explains Bradley Eli, DMD, MS, an orofacial pain specialist.
It’s common for jaw discomfort to linger for a while even after an ear infection has fully cleared. This is usually because the muscles around the jaw have been guarding — tensing up in response to pain — during the infection, and that muscle tension doesn’t always resolve on its own once the underlying infection is treated. This is a jaw-specific problem at that point, not a sign the ear infection is still present, and it responds to the same conservative approach used for other TMJ flare-ups.
Jaw rest and heat or cold therapy can help calm residual muscle tension, and the Speed2Treat® Home Healing Kit — which includes the QuickSplint® anterior bite guard, a hot/cold therapy wrap, and guided jaw exercises — can support the jaw while it recovers from the guarding pattern, not as a treatment for the infection itself, but as part of recovering normal jaw function afterward. If the jaw was significantly affected during the illness, gentle jaw exercises can help restore full range of motion once acute symptoms have settled.
See a doctor promptly, rather than waiting, if jaw pain is accompanied by fever, facial swelling in front of the ear, significant difficulty opening the mouth, or if it’s occurring in a young child — these can be signs of a more serious infection requiring urgent evaluation, not routine TMD. For adults with a normal ear exam and jaw pain that’s clearly tied to jaw movement, a dentist or orofacial pain specialist is the more appropriate next step.
Yes. It most often happens through referred pain, since the ear and jaw share overlapping nerve pathways. In rare cases, infection can spread directly into the jaw joint itself.
An ear infection usually shows visible signs on an ear exam, such as redness or fluid. If the ear exam is normal and the pain is clearly worse with chewing or wide mouth opening, TMD is the more likely cause.
This is rare, but it is taken seriously because it can lead to stiffening of the jaw joint if not treated promptly, especially in young children. Persistent jaw pain, swelling, or trouble opening the mouth during or after an ear infection should be evaluated.
This is usually residual muscle guarding around the jaw rather than a sign the infection is still present. Jaw rest, heat or cold therapy, and gentle movement typically help it resolve.
If there’s an active infection or abnormal ear exam findings, start with an ENT or your primary care doctor. Once the infection has been addressed and jaw discomfort persists on its own, a dentist or orofacial pain specialist can evaluate the jaw component.
Yes — jaw pain is actually a recognized feature of outer ear infections (otitis externa), since jaw movement can directly compress the inflamed ear canal.
