Trigeminal neuralgia is not a single, uniform condition — it can be paroxysmal, chronic, idiopathic, secondary, or even a component of painful neuropathy.
This is why it is so important for a patient to be seen by a specialist (neurologist) who, based on the ICHD-3 classification, will establish the correct diagnosis and recommend optimal treatment.
The International Classification of Headache Disorders (ICHD-3, 3rd edition) distinguishes several types of trigeminal neuralgia based on etiology, course, and character of pain.
Diagnostic Criteria for Trigeminal Neuralgia (ICHD-3)
For trigeminal neuralgia to be diagnosed, specific conditions must be met:
- recurrent paroxysms of unilateral facial pain in the distribution of the trigeminal nerve,
- pain that:
- lasts from a fraction of a second to 2 minutes,
- is severe, intense, and electric shock-like,
- is commonly triggered by innocuous stimuli (e.g., touching the face, brushing teeth, speaking, a gust of wind),
- not better accounted for by another headache diagnosis.
Types of Trigeminal Neuralgia According to ICHD-3
1. Classical Trigeminal Neuralgia
The most commonly diagnosed form, usually associated with neurovascular compression.
- Purely paroxysmal — pain occurs only as sudden attacks.
- With concomitant continuous pain — between attacks, the patient also experiences chronic, constant pain.
2. Secondary Trigeminal Neuralgia
Occurs as a consequence of another disease.
- associated with multiple sclerosis,
- caused by space-occupying lesions (e.g., tumor, cyst, angioma),
- attributed to another identified cause (e.g., metabolic disease, trauma).
3. Idiopathic Trigeminal Neuralgia
Diagnosed when no specific cause can be identified.
- Purely paroxysmal,
- with concomitant continuous pain.
4. Painful Trigeminal Neuropathy
Here the problem is not only paroxysmal pain, but actual nerve damage.
Subtypes include:
- painful neuropathy attributed to herpes zoster,
- postherpetic neuralgia,
- post-traumatic painful neuropathy (e.g., following facial trauma or surgery),
- neuropathy associated with other disorders (e.g., metabolic, infectious),
- idiopathic painful neuropathy (no identifiable cause).
What Does This Classification Provide?
Precise diagnosis — by determining the type of neuralgia, the physician knows which additional tests to perform and which treatment to apply.
Individualized therapy — classical neuralgia is treated differently (e.g., pharmacotherapy, neurosurgical procedures) than painful neuropathy (where rehabilitation and treatment of the underlying condition are also important).
Better prognosis — knowing the cause of pain helps predict the likelihood of successful treatment.
Natalia — since 2014 I've been living with trigeminal nerve pain. I write in plain language, based on reliable sources and personal experience. Read my story →
Frequently Asked Questions
What is trigeminal neuralgia?
Trigeminal neuralgia is a chronic facial pain condition. It manifests as sudden, severe, usually one-sided pain attacks — often described as an electric shock. A single attack typically lasts from a few seconds to about two minutes.
What is the difference between neuralgia and neuropathy?
In simple terms: neuralgia primarily involves paroxysmal pain along a nerve, usually without loss of sensation. Neuropathy involves nerve damage that more often causes constant pain along with numbness and sensory loss.
What is neurovascular conflict (vascular compression)?
This is the most common cause of classical trigeminal neuralgia — a blood vessel compresses the nerve root at the base of the brain, damaging its myelin sheath and triggering pain.
What is postherpetic neuralgia?
This is chronic nerve pain following shingles (herpes zoster), resulting from nerve damage caused by the virus. It is a distinct condition and can be challenging to treat.
Which doctor should I see for facial pain?
First, see a neurologist. If surgery is being considered, a neurosurgeon. If a dental cause is suspected, it is also worth ruling it out with a dentist.
Related Articles
Types of Trigeminal Neuralgia — A Comprehensive Overview
I keep returning to this topic because trigeminal neuralgia needs to be discussed, not to frighten, but to educate, explain, and foster understanding.
Trigeminal Neuralgia Epidemiology — Who Gets It and How Common Is It
Trigeminal neuralgia is not only an extremely distressing condition but also a significant public health problem worldwide.
Alpha-Lipoic Acid and Trigeminal Neuropathy: What We Actually Know
Today I want to take a closer look at alpha-lipoic acid (ALA). Many of you probably already know this organic compound well — it frequently comes up in con…
Track your attacks, triggers, and medications — and show your doctor a clear picture of your condition.