noun
nervous disorder; nerve disease
General medical term for diseases of the nervous system; can also refer to neurosis in older usage.
彼は神経病の治療のために入院した。
He was hospitalized for treatment of a nervous disorder.
神経病の専門医に診てもらったほうがいい。
You should see a specialist in nerve diseases.
神経痛 means neuralgia (nerve pain), a symptom rather than a disease category.
Compound of 神経 (nerve) + 病 (disease).