Jaw pain as an ACS presentation is particularly important in women, diabetics, and the elderly who frequently present with atypical MI symptoms. Up to 30% of MIs in women present without classic chest pain (British Heart Foundation, 2022). GCA (temporal arteritis) is the most critical non-cardiac emergency — jaw claudication has a positive predictive value of ~70% for GCA in the appropriate clinical context. Vision loss from anterior ischaemic optic neuropathy in GCA is irreversible; treatment must begin before biopsy confirmation (NICE NG197). Ludwig's angina is a rapidly spreading submandibular cellulitis with mortality of 10–40% — airway compromise is the primary threat.

The jaw pain history is richly informative — character and aggravating factors alone usually separate the key diagnoses. Jaw claudication (pain on chewing relieved by rest) has a sensitivity of 54% and specificity of 87% for GCA (Smetana & Shmerling, 2002). Bisphosphonate history is critical — medication-related osteonecrosis of the jaw (MRONJ) is a recognised complication of IV bisphosphonates (used in osteoporosis and malignancy) and is worsened by dental extraction; the risk profile must be communicated to dentists before procedures. Stress and parafunctional habits (bruxism) are the dominant drivers of temporomandibular disorders (TMD), the most common cause of non-dental jaw pain seen in general practice.

TMD is responsible for ~12% of all orofacial pain presentations — it is predominantly a biopsychosocial condition where psychological factors (anxiety, stress, catastrophising) are as important as structural abnormalities (NICE CKS 2023). Understanding this drives the treatment approach towards self-management rather than medicalisation. Trigeminal neuralgia requires neuroimaging — MRI brain is essential to exclude secondary causes (multiple sclerosis demyelinating plaque at the trigeminal root in 14%, vascular compression, posterior fossa tumour). Parotid tumours are predominantly benign but 25% are malignant — painless progressive swelling at the angle of the jaw requires 2WW referral per NICE NG12.

Temporal artery examination is a key GP skill for GCA — a thickened, tender, beaded, non-pulsatile temporal artery has a positive likelihood ratio of 4.6 for GCA (Smetana, 2002). Measuring maximum mouth opening differentiates TMD (limited, painful) from other causes — normal is 40–55mm in adults. Oral cavity inspection is mandatory: oral cancer affects ~9,000 people in the UK annually (Cancer Research UK, 2023), with 5-year survival of >80% if caught early but <50% if late. Persistent mouth ulcer, red/white patch, or non-healing lesion ≥3 weeks must trigger 2WW referral per NICE NG12. The GP examination of the oral cavity is a core curriculum competency often tested in the SCA.

The most critical investigation decision is recognising when jaw pain represents ACS — in this situation, no primary care investigations should delay 999. For GCA, NICE NG197 explicitly states that prednisolone should be started immediately if visual symptoms are present, without waiting for ESR or biopsy results — the irreversibility of GCA-related blindness means the risk of over-treatment is far outweighed by the risk of delay. The false-negative rate of temporal artery biopsy is 10–44% (sampling error) — a negative biopsy does not exclude GCA in a clinically convincing presentation. MRI for trigeminal neuralgia is a NICE recommendation (QS185) and should be arranged before long-term carbamazepine to ensure no secondary cause is missed.

The 2WW pathway for oral malignancy is mandated by NICE NG12 — oral cancer has a grim late-stage prognosis (5-year survival <50% stage IV) but excellent early-stage prognosis (>80% stage I/II). The three-week rule for non-healing oral lesions is a key GP curriculum competency. Dental access is a recognised NHS problem — GPs increasingly see patients who cannot access dentists; familiarity with emergency dental pathways (NHS 111, urgent dental services) is essential. TMD is overwhelmingly managed conservatively — the majority of patients improve with education and self-management without specialist input, and medicalisation/over-investigation causes harm.

Carbamazepine achieves complete pain relief in ~70% of trigeminal neuralgia cases (NNT ~2) — it is first-line per NICE QS185. Monitoring is essential: carbamazepine causes hyponatraemia (SIADH), bone marrow suppression, and hepatotoxicity. It is also a potent enzyme inducer with numerous drug interactions (warfarin, OCP, statins). For TMD, NICE CKS (2023) emphasises that most patients improve with reassurance, explanation of the biopsychosocial model, and self-management — overprescribing opioids or benzodiazepines perpetuates chronicity. Antibiotics for dental abscess treat cellulitis only — definitive treatment is drainage (extraction or root canal); failure to communicate this leads to undertreated dental emergencies.

TMD self-management is as effective as specialist intervention for the majority of patients — a Cochrane review (Cochrane 2020) found no consistent benefit of specialist interventions (splints, physiotherapy, surgery) over well-delivered self-management programmes for mild-to-moderate TMD. The biopsychosocial model is central to NICE CKS guidance — explaining to patients that their jaw pain is not structural damage but a pain-sensitisation/muscle problem with psychological drivers reduces catastrophisation and improves outcomes. The resting tongue position (tongue on palate, teeth apart) is a simple behavioural intervention that significantly reduces daytime clenching. Night guards reduce morning symptoms but do not resolve underlying bruxism — combined with stress management they are most effective.

GCA monitoring requires structured follow-up — steroid tapering too rapidly leads to relapse with risk of permanent vision loss; tapering too slowly causes cumulative steroid toxicity. Temporal artery biopsy must be arranged urgently (within 1–2 weeks of starting steroids) as sensitivity decreases with treatment duration. The three-week rule for oral lesions is a hard stop — there is no clinical justification for watchful waiting beyond 3 weeks for an oral lesion that could be cancer. Documentation of the three-week safety net discussion is an RCGP curriculum requirement and a medico-legal imperative. Bisphosphonate-related osteonecrosis of the jaw (MRONJ/BRONJ) is preventable — preventive dental care before starting bisphosphonates reduces risk by over 60% (AAOMS, 2022).