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Brief pain resembling an electric shock, a sudden stab, a shooting sensation or intense burning may occur in neuralgia of the trigeminal, glossopharyngeal or nervus intermedius nerves, in occipital neuralgia and in several rarer syndromes.
However, not every facial pain described by a patient as “neuralgia” is actually a neuralgia. Continuous burning pain, sensory abnormalities, pain following a dental procedure, herpes zoster or trauma belong to different categories of neuropathic facial pain and require a different diagnostic approach.
In the International Classification of Headache Disorders, neuralgias are characterised primarily by brief paroxysms of pain within the distribution of a specific nerve. Some syndromes have highly characteristic triggers: touch, speaking, chewing, swallowing or head movement.
The dominant feature is brief, severe, shooting or electric shock-like pain. Patients may be pain-free between paroxysms, although some neuralgias may have associated continuous pain.
There is injury or disease of a nerve. Pain is usually continuous or near-continuous, burning, pressing or tingling, with numbness, allodynia or hyperalgesia.
Pain may not follow the territory of an individual nerve, may be dull, aching or poorly localised, and may persist for much of the day.
Trigeminal neuralgia (TN) is characterised by recurrent, unilateral paroxysms of very severe pain in the distribution of one or more divisions of the trigeminal nerve.
A brief refractory period often follows a typical paroxysm, during which stimulation of the trigger zone does not immediately produce another attack.
This can be useful in differential diagnosis, particularly when distinguishing TN from SUNCT or SUNA.
Yes. ICHD-3 distinguishes trigeminal neuralgia with purely paroxysmal pain from trigeminal neuralgia with concomitant continuous or near-continuous pain in the same distribution.
Background pain does not exclude TN when the characteristic triggered electric shock-like paroxysms remain present.
Modern classification does not stop at recognising the clinical syndrome. After the TN phenotype has been identified, the next question is whether imaging reveals a cause that explains it.
| Form | Defining feature | MRI finding | Clinical relevance |
|---|---|---|---|
| Classical TN | Neurovascular compression of the trigeminal root with morphological changes | Not merely contact, but compression associated with atrophy, displacement, distortion or indentation of the root | In medically refractory disease, microvascular decompression may become particularly relevant |
| Secondary TN | Another disease has been identified that explains the neuralgia | For example, a demyelinating lesion in multiple sclerosis, a cerebellopontine angle tumour, AV malformation or another structural cause | Treatment addresses both the pain and the underlying disorder |
| Idiopathic TN | Clinical criteria for TN are met, but no explanatory cause is identified | No neurovascular compression with morphological root changes and no other causative disease | Management depends on drug response, tolerability and individual anatomy |
In multiple sclerosis, TN may be related to a demyelinating lesion at the trigeminal root entry zone or within pontine trigeminal pathways.
Some patients with MS also have neurovascular compression, so the pain mechanism does not always result from demyelination alone.
In painful trigeminal neuropathy, there is injury or disease of the trigeminal nerve, and the dominant pain is generally continuous or near-continuous.
It is more commonly described as burning, squeezing, tingling, pins and needles, or unpleasant painful skin sensitivity. Short paroxysms may occur, but they are not the dominant pain type.
Persistent neuropathic pain with altered sensation may occur after tooth extraction, implant placement, maxillofacial surgery, facial trauma or direct nerve injury.
This syndrome should not automatically be labelled “trigeminal neuralgia”: the mechanism, diagnostic criteria and treatment strategy are different.
Occipital neuralgia is characterised by unilateral or bilateral paroxysmal, shooting, stabbing or sharp pain in the distribution of the greater, lesser and/or third occipital nerves.
Individual paroxysms usually last from a few seconds to several minutes. Dysaesthesia, scalp allodynia, tenderness over the nerve or trigger points may be present.
Glossopharyngeal neuralgia consists of brief attacks of severe, electric shock-like, shooting or stabbing pain felt deep in the throat, at the base of the tongue, in the tonsillar region, ear and/or beneath the angle of the jaw.
Typical duration is from several seconds to 2 minutes. Attacks are characteristically precipitated by swallowing, coughing, speaking or yawning.
This is a very rare syndrome, historically also called geniculate neuralgia. Pain is felt deep in the auditory canal or around the auricle, and may radiate to the temporal region, mastoid area or angle of the jaw.
Paroxysms last from several seconds to several minutes and may be provoked by stimulation of the posterior wall of the auditory canal or the periauricular region.
Altered taste, lacrimation or salivation may occasionally occur. Because the sensory innervation of the ear overlaps substantially, it may be difficult to attribute pain with certainty to a single cranial nerve.
Neck-tongue syndrome is a rare disorder in which sudden rotation of the head causes abrupt unilateral pain in the upper neck and/or occiput, together with an abnormal sensation, numbness or apparent abnormal position of the ipsilateral half of the tongue.
An attack generally lasts seconds to several minutes. This distinctive temporal combination helps distinguish the syndrome from more common forms of cervicogenic pain.
| Syndrome | Pain location | Duration | Typical triggers | Key features |
|---|---|---|---|---|
| Trigeminal neuralgia | V1, V2 and/or V3, most commonly V2–V3 | Fraction of a second – 2 min | Touch, chewing, speaking, washing the face, tooth brushing | Electric shock-like paroxysms, trigger zones, often a refractory period |
| SUNCT / SUNA | Often V1, periorbital or temporal | 1–600 sec | Mechanical triggers may occur | Prominent cranial autonomic symptoms; often many attacks per day |
| Glossopharyngeal neuralgia | Throat, base of tongue, ear, beneath the angle of the jaw | Seconds – 2 min | Swallowing, speaking, coughing, yawning | Rarely associated with bradycardia or syncope |
| Nervus intermedius neuralgia | Deep auditory canal, ear, mastoid region | Seconds – minutes | Posterior auditory canal, periauricular region | Rare; taste or secretory symptoms may occur |
| Occipital neuralgia | Occiput, upper scalp, sometimes radiating towards the eye | Seconds – minutes | Pressure over the nerve; neck movement may aggravate symptoms | Nerve tenderness, allodynia; temporary response to diagnostic block |
| Neck-tongue syndrome | Upper neck / occiput plus one half of the tongue | Seconds – several minutes | Sudden head rotation | Simultaneous abnormal sensation or apparent abnormal position of the tongue |
For more on brief trigeminal-autonomic attacks: cluster headache, SUNCT and SUNA .
Persistent idiopathic facial pain (PIFP), previously often called “atypical facial pain”, differs substantially from classical neuralgia.
According to ICHD-3, pain occurs daily for more than 2 hours per day for more than 3 months, is poorly localised, does not follow the distribution of a peripheral nerve and is typically described as dull, aching or nagging.
When chronic facial pain is mistaken for dental disease or classical TN, patients may undergo unnecessary tooth extraction, endodontic treatment or other procedures that do not resolve the original pain syndrome.
There is no single mechanism shared by all these syndromes. The underlying process depends on the type of pain.
Classical trigeminal neuralgia is associated with vascular compression of the trigeminal root together with morphological changes. A related mechanism may occur in some other cranial neuralgias.
Multiple sclerosis, tumours, arteriovenous malformations and other lesions of the brainstem or skull base may produce secondary neuralgic syndromes.
Herpes zoster, trauma, surgery, dental procedures or other nerve injury may lead to painful neuropathy with persistent pain and sensory abnormalities.
The diagnosis of trigeminal neuralgia is primarily clinical. Neuroimaging does not replace a detailed history, but it helps determine the disease subtype, identify a structural cause and guide surgical decision-making.
MRI is an important part of the assessment of a patient with TN. High-resolution three-dimensional sequences are particularly useful for visualising the cisternal trigeminal nerve and its relationship to adjacent vessels.
Practical protocols may include thin-section 3D T2-weighted sequences such as CISS/FIESTA/SPACE, angiographic sequences to assess arteries, and contrast-enhanced T1 imaging when clinically indicated.
No. There is no universal “head and neck MRI with thin sections along all nerves” for every type of facial pain. The imaging protocol should follow the suspected syndrome.
In TN, the priority is the brain, posterior fossa and trigeminal nerve. In occipital pain, additional cervical imaging may be appropriate when the history or examination suggests cervical pathology.
Pain felt in the teeth, jaw, ear or sinus region is not necessarily dental or ENT in origin. Conversely, before diagnosing idiopathic facial pain, relevant local pathology should be appropriately excluded when the clinical presentation suggests it.
Carbamazepine and oxcarbazepine remain the principal first-line medications.
They reduce pathological high-frequency neuronal firing through effects on voltage-gated sodium channels.
When efficacy is insufficient or tolerability is poor, lamotrigine, baclofen, gabapentin or pregabalin may be considered in different clinical settings.
The evidence base is not identical for all of these drugs, and selection depends on phenotype and comorbidity.
In poorly controlled TN, other sodium-channel acting drugs, including lacosamide or eslicarbazepine, may be considered.
These options do not replace standard first-line treatment, but are increasingly discussed in refractory TN.
Botulinum toxin type A has been studied mainly in trigeminal neuralgia, particularly when standard medication provides insufficient benefit or is poorly tolerated.
Randomised studies and several meta-analyses suggest reductions in pain intensity and attack frequency compared with placebo in some patients.
Separate reference page: botulinum toxin therapy for trigeminal neuralgia .
Surgical treatment is considered when medication does not provide acceptable pain control or causes clinically significant adverse effects.
In classical TN with documented neurovascular compression, microvascular decompression (MVD) is the principal non-destructive surgical procedure.
The offending vessel is separated from the trigeminal root, without intentionally damaging the nerve.
Depending on age, comorbidity, MRI findings and patient preference, options may include radiofrequency thermocoagulation, balloon compression, glycerol rhizotomy or stereotactic radiosurgery.
These procedures directly affect the trigeminal pathway and may result in sensory adverse effects.
The evidence base for treatment of occipital neuralgia is considerably less standardised than that for classical TN.
Depending on the clinical situation, management may include medications used for neuropathic pain, local blocks of the greater and/or lesser occipital nerve, and treatment of an associated cervical pain source.
Various interventional, neuromodulatory and surgical approaches have been described for persistent refractory disease, but there is currently no single universally accepted treatment algorithm.
Botulinum toxin has also been studied in occipital neuralgia, but the evidence is substantially weaker than in trigeminal neuralgia. It should therefore not be regarded as standard first-line therapy.
Because the disorder is rare, controlled trial data are limited, and pharmacological management largely follows experience from trigeminal neuralgia. Sodium-channel blocking antiepileptic drugs, particularly carbamazepine or oxcarbazepine, are commonly used.
In medically refractory classical cases with documented neurovascular compression, microvascular decompression may be considered. Modern systematic data suggest high long-term efficacy in appropriately selected patients, although the rarity of the disorder limits the quality of available evidence.
Because this syndrome is exceptionally rare, the evidence base consists mainly of observational series and case reports. It is particularly important to confirm that the phenotype really fits this diagnosis rather than otological disease, trigeminal neuralgia, glossopharyngeal neuralgia or occipital neuralgia.
There is no substantial randomised treatment evidence for neck-tongue syndrome. Management depends on symptom frequency, suspected cervical pathology and the individual clinical context.
A typical brief triggered paroxysm may fit a primary neuralgia well, but some features should broaden the diagnostic evaluation.
In these situations, the investigation depends on the suspected cause and may include brain MRI, dedicated cranial nerve sequences, vascular imaging or other tests.
See also: new headache and red flags .
This page is intended as academic medical reference material and does not replace individual diagnosis. The diagnostic and therapeutic approach depends on the clinical phenotype, cause of pain, comorbid conditions and local availability of treatment options.