Neuralgia refers to severe nerve pain that travels along the pathways of the nervous system. Historically difficult to treat and often sudden in onset, it was a familiar complaint in nineteenth-century medical writing. In literary contexts the word lends itself to metaphorical use, suggesting pain that strikes unexpectedly and repeatedly. Poets sometimes employ neuralgia to represent emotional torment that flares up like a physical nerve pain, emphasising the way mental distress can feel as acute and involuntary as bodily suffering.

Neuralgia describes sharp recurring pain along a nerve. In poetry the condition often symbolises sudden flashes of emotional suffering. The intermittent nature of neuralgia mirrors memories or regrets that strike unexpectedly. Writers may use the term metaphorically to depict psychological pain that repeatedly returns.