Lesser occipital neuralgia (LON) is a neurological disorder characterized by paroxysmal pain along the distribution of the lesser occipital nerve. Despite being less common than other neuralgias, LON can significantly impact the quality of life of affected individuals. This review aims to provide a comprehensive overview of the clinical features, diagnostic criteria, pathophysiology, and management strategies for lesser occipital neuralgia based on current evidence and clinical expertise.

Introduction: Lesser occipital neuralgia is a neuropathic pain syndrome involving the lesser occipital nerve, which arises from the cervical plexus and innervates the posterior scalp. Understanding the distinct clinical features and diagnostic approaches for LON is crucial for accurate diagnosis and effective management.

Epidemiology: The epidemiology of lesser occipital neuralgia remains poorly defined, with limited epidemiological data available. It is believed to be less prevalent than other neuralgias such as trigeminal neuralgia. LON can occur at any age but is more commonly reported in adults, with a possible predilection for females.

Clinical Features: Lesser occipital neuralgia typically presents with paroxysmal shooting or stabbing pain along the distribution of the lesser occipital nerve, which extends from the posterior scalp to the neck. Pain may be triggered or exacerbated by activities such as neck movement, prolonged sitting, or pressure on the affected area. Patients may describe associated symptoms such as scalp tenderness, numbness, or tingling sensations.

Pathophysiology: The pathophysiology of lesser occipital neuralgia involves irritation, entrapment, or injury to the lesser occipital nerve, leading to ectopic firing of nociceptive fibers. Compression of the nerve by surrounding structures such as muscles, fascia, or bony prominences may contribute to nerve dysfunction and pain generation. Additionally, underlying cervical spine pathology or trauma can predispose individuals to LON.

Diagnosis: The diagnosis of lesser occipital neuralgia relies on clinical history, physical examination, and diagnostic nerve blocks. Patients typically report paroxysmal shooting or stabbing pain along the distribution of the lesser occipital nerve, exacerbated by specific triggers. Tenderness along the nerve course and reproduction of pain with palpation may be elicited during physical examination. Diagnostic nerve blocks targeting the lesser occipital nerve can provide both diagnostic confirmation and therapeutic relief.

Management: Management of lesser occipital neuralgia involves a multimodal approach aimed at reducing pain frequency and intensity. Conservative treatments include physical therapy, transcutaneous electrical nerve stimulation (TENS), and oral medications such as nonsteroidal anti-inflammatory drugs (NSAIDs), anticonvulsants, and tricyclic antidepressants. In refractory cases, interventional procedures such as nerve blocks, pulsed radiofrequency ablation, or surgical decompression may be considered. Non-pharmacological modalities including acupuncture, massage therapy, and biofeedback can complement pharmacotherapy in comprehensive pain management.

Conclusion: Lesser occipital neuralgia is a neurological disorder characterized by paroxysmal pain along the distribution of the lesser occipital nerve, impacting the quality of life of affected individuals. Accurate diagnosis and appropriate management are essential for optimizing patient outcomes and relieving suffering. Further research is needed to elucidate the underlying pathophysiological mechanisms and optimize therapeutic strategies for lesser occipital neuralgia. Collaboration between neurologists, pain specialists, and physical therapists is crucial for comprehensive management and patient-centered care.