Trigeminal Neuralgia

If you are living with sudden, electric-shock-like jolts of pain across one side of your face — triggered by chewing, brushing your teeth, a breeze, or even a smile — you may have trigeminal neuralgia. It is one of the most painful conditions known to medicine, and also one of the most treatable.

What Is Trigeminal Neuralgia?

Trigeminal neuralgia is a disorder of the fifth cranial nerve (the trigeminal nerve), which carries sensation from the face, scalp, teeth, and jaw. Most often, a small artery or vein loops against the nerve at the root exit zone, causing it to misfire. The pain is unlike almost anything else in medicine — an electric shock, stabbing, or lightning bolt in the cheek, jaw, gums, or forehead, lasting seconds, triggered by ordinary touch. It affects about 4 to 13 people per 100,000 each year, most often adults over 50.

At a Glance

Trigeminal neuralgia causes sudden, severe, electric-shock-like pain in the face, usually on one side, triggered by light touch, chewing or talking.
Most cases are caused by a blood vessel pressing on the trigeminal nerve where it exits the brainstem — a treatable, structural problem.
First-line treatment is medication (carbamazepine or oxcarbazepine), which controls pain in about 75% of patients at least initially.
When medication fails, microvascular decompression (MVD) offers the highest chance of durable, drug-free pain relief — about 70% of patients are pain-free 10 years later.
Less invasive options include Gamma Knife radiosurgery and percutaneous rhizotomy — excellent for older patients or those who cannot tolerate open surgery.

Symptoms

The classic pattern

Sudden, severe, one-sided facial pain — usually in cheek, jaw, gum, or forehead; almost never crossing the midline
Described as electric shock, stabbing, shooting, or burning, lasting seconds at a time
Triggered by: brushing teeth, shaving, washing the face, chewing, talking, drinking cold water, a breeze on the cheek
Comes in clusters or volleys followed by pain-free intervals that can last minutes, hours, or weeks

Branch distribution

V1 (ophthalmic) — forehead, eyebrow, upper eyelid; less commonly affected alone
V2 (maxillary) — cheek, upper lip, upper teeth, side of nose; most commonly affected branch
V3 (mandibular) — lower jaw, lower teeth, lower lip, chin; also commonly involved

Diagnosis

Trigeminal neuralgia is primarily a clinical diagnosis. Imaging is essential to rule out a secondary cause and to look for neurovascular compression.

High-resolution MRI (3T scanner with thin-slice FIESTA or CISS sequences)

Can show an artery or vein touching and indenting the nerve at the brainstem. Severe neurovascular contact was found on the painful side in ~53% of patients versus ~13% on the non-painful side.

Ruling out secondary causes

Tumors near the trigeminal nerve (vestibular schwannomas, meningiomas, epidermoid cysts)
Multiple sclerosis — causes TN in 2–5% of people with MS
Arteriovenous malformations

Types

Classical trigeminal neuralgia (TN1) — ~75%

Purely paroxysmal pain with normal sensation between attacks. Often due to vascular compression.

Idiopathic trigeminal neuralgia — ~10%

Same symptoms but no identifiable cause on imaging.

Secondary trigeminal neuralgia — ~15%

Caused by MS, tumors, or vascular malformations.

Atypical trigeminal neuralgia (TN2)

Shock-like pain plus constant aching or burning background pain.

Treatment

Step 1: Medication

Carbamazepine (Tegretol)
Oxcarbazepine (Trileptal)
Second-line: lamotrigine, baclofen, gabapentin, pregabalin

Step 2: Microvascular decompression (MVD)

Surgery relieves vascular compression of the nerve using a small Teflon pad. Most effective long-term treatment.

Step 3: Gamma Knife radiosurgery

Focused radiation to the trigeminal nerve; outpatient procedure with delayed pain relief.

Step 4: Percutaneous rhizotomy

Balloon compression
Glycerol rhizolysis
Radiofrequency thermocoagulation

Outcomes

References

Our Specialists

Peter Warnke, MD

Neurosurgery

Peleg Horowitz, MD, PhD

Neurosurgery

David Satzer, MD

Neurosurgery

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