# A nurse is assessing a 65-year-old client who reports severe facial pain. Which assessment finding would be most characteristic of trigeminal neuralgia?

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## 문제

A nurse is assessing a 65-year-old client who reports severe facial pain. Which assessment finding would be most characteristic of trigeminal neuralgia?

## 보기

1. Constant, dull aching pain along the jaw line that worsens with movement
2. Sharp, electric shock-like pain triggered by light touch to the face **✔ 정답**
3. Throbbing pain accompanied by facial swelling and redness
4. Burning sensation with numbness extending from ear to chin

**정답: 2**

## 해설

Trigeminal neuralgia is characterized by sharp, electric shock-like pain triggered by light touch to the face. Other options describe constant, throbbing, or burning pain which are not typical for this condition.

## 심화 해설

Understanding Trigeminal Neuralgia Pain Characteristics

The correct answer is Sharp, electric shock-like pain triggered by light touch to the face. This description aligns precisely with the pathognomonic clinical presentation of trigeminal neuralgia (TN). The condition is not characterized by constant, dull, or throbbing pain, nor by primary sensations of burning numbness, which helps differentiate it from other orofacial pain disorders.

Pathophysiology and Clinical Correlation

The classic symptom pattern is directly explained by the underlying pathophysiology. In TN, demyelination of the primary sensory trigeminal afferents occurs in the nerve's root entry zone [2]. This demyelination is considered the predominant mechanism and is sufficient to induce TN-like pain [3]. The loss of myelin sheath integrity allows for the generation of ectopic impulses and ephaptic crosstalk, where tactile signals from large myelinated (A-beta) fibers directly stimulate adjacent nociceptive fibers [2]. This explains why a non-painful stimulus, such as a light touch or a breeze, can trigger a severe paroxysmal pain response. The pain is characteristically unilateral, has an abrupt onset and cessation, and is described as brief, electric, and shock-like [1, 2].

Differentiating from Other Facial Pain

Accurate assessment is critical because TN is frequently misdiagnosed, particularly in dental settings, leading to unnecessary procedures [4]. The other options describe different pain syndromes:

- Constant, dull aching pain is more indicative of temporomandibular joint disorder or myofascial pain.

- Throbbing pain with swelling and redness suggests an inflammatory or infectious process, such as an abscess or sinusitis.

- Burning sensation with numbness is characteristic of neuropathic pain from post-herpetic neuralgia or a traumatic nerve injury, which involves continuous pain, a feature that can also be present in a subset of TN patients but is not the defining paroxysmal characteristic [2].

The hallmark of classical TN remains the touch-evoked, paroxysmal, electric shock-like pain in one or more divisions of the trigeminal nerve [1, 4].References (research sources)

- [2]Trigeminal neuralgia - diagnosis and treatment.Research articleMaarbjerg S, Di Stefano G, Bendtsen L, Cruccu G. (2017) · DOI: 10.1177/0333102416687280

- [3]Trigeminal root demyelination is sufficient to induce trigeminal neuralgia-like facial pain in adult rodents.Research articleWang ZY, Ding YQ, Wen JM, Zheng BW, Zhang K, Qi JG. (2025) · DOI: 10.1186/s10194-025-02162-5

- [4]Trigeminal neuralgia: a primer for dental practitioners.Research articleElsaraj SM, Kasha-Blois R, Wint-White R, Iacopino AM, Shoppoff L, Cioffi I. (2026) · DOI: 10.3290/j.qi.b7060092

## 임상 시나리오

Trigeminal Neuralgia Assessment GuideIdentifying the Pathognomonic Pain Pattern
The hallmark of trigeminal neuralgia is a paroxysmal, electric shock-like pain that is unilateral and lasts from a few seconds to 2 minutes.

Pain is triggered by innocuous stimuli such as light touch, chewing, talking, or a breeze. This occurs due to ephaptic crosstalk from demyelination at the nerve root entry zone.

CautionDo not mistake this for dental pain. TN is frequently misdiagnosed, leading to unnecessary tooth extractions or root canals. A normal dental exam with trigger-evoked pain is a key differentiator.

## 핵심 개념

- **Trigeminal Neuralgia** — A chronic pain condition affecting the trigeminal nerve, characterized by severe, sporadic, electric shock-like facial pain triggered by light touch.
- **Ephaptic Crosstalk** — Abnormal electrical coupling between adjacent demyelinated nerve fibers, allowing tactile signals to directly stimulate pain fibers.
- **Paroxysmal Pain** — Sudden, intense, and short-lived pain attacks with abrupt onset and cessation, typical of trigeminal neuralgia.
- **Demyelination** — Loss of the protective myelin sheath around nerve fibers, a key pathophysiological mechanism in trigeminal neuralgia.
- **Pathognomonic** — A symptom or sign that is distinctively characteristic of a specific disease, such as electric shock-like pain triggered by light touch in TN.

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