Jaw Pain

Jaw pain most often means temporomandibular disorder (TMD), a group of conditions affecting the jaw joint and the muscles that move it. The commonest form is myofascial: the chewing muscles become overworked and tender from clenching, grinding and sustained tension, producing a dull ache in front of the ear, around the temple, and sometimes referred to the neck and head. Joint-focused TMD adds clicking, popping or locking as the disc within the joint displaces. Both are strongly associated with stress, poor sleep and parafunctional habits — daytime clenching is frequently unconscious and underestimated by the person doing it. The clinical message that matters most is prognosis and restraint: the majority of TMD improves with conservative measures over weeks to months, and the evidence does not support irreversible interventions such as extensive occlusal adjustment, orthodontics or surgery as first-line treatment. Soft diet, jaw rest, heat, gentle exercises, addressing clenching, and a properly fitted splint form the core. Critically, jaw pain has dangerous mimics: pain in the jaw during exertion can be cardiac, and jaw or temple pain in someone over 50 with scalp tenderness or visual change may be giant cell arteritis, which threatens sight and needs same-day treatment.

• •Dull aching pain in front of the ear, in the temple or along the jawline
• •Pain worse on chewing, yawning or prolonged talking
• •Clicking, popping or grating in the jaw joint
• •Jaw locking open or closed, or restricted mouth opening
• •Morning jaw stiffness and tenderness suggesting night-time grinding
• •Headaches, particularly temporal
• •Earache with normal ear examination
• •Neck and shoulder tension
• •Worn, flattened or sensitive teeth from grinding
• •Tinnitus or a feeling of ear fullness

• •Clenching and grinding, both daytime and nocturnal
• •Stress and anxiety raising muscle tension
• •Disc displacement within the temporomandibular joint
• •Osteoarthritis or inflammatory arthritis of the joint
• •Trauma to the jaw or whiplash injury
• •Poor sleep and obstructive sleep apnoea, which increases grinding
• •Excessive gum chewing, nail biting and hard or chewy foods
• •Dental problems, infection or an abscess
• •Hypermobility syndromes
• •Referred pain from the neck
• •Cardiac ischaemia presenting as exertional jaw pain
• •Giant cell arteritis in those over 50

Sustained clenching loads the masseter and temporalis muscles far beyond their design for intermittent chewing, producing ischaemic muscle pain and trigger points. Within the joint, the articular disc can displace anteriorly, catching on opening (the click) or blocking it entirely (locking). Central pain sensitisation develops in chronic cases, which is why TMD frequently coexists with fibromyalgia, headache and other chronic pain conditions, and why purely mechanical explanations often fail. Stress and poor sleep both raise nocturnal muscle activity and lower pain thresholds, closing the loop.