求翻译：原发性三叉神经痛（trigeminal neuralgia,TN）是发生在三叉神经分布区内反复发作的阵发性剧烈疼痛，好发于中老年，易反复，患者非常痛苦。是什么意思？

Trigeminal neuralgia (trigeminal neuralgia, TN) is the distribution of the trigeminal nerve in the area of ​​recurrent paroxysmal severe pain occurs in middle-aged, easily repeated, were very painful.

The development of 3 fork neuropathic pain (trigeminal neuralgia, TN) that takes place in 3 fork nerves within 6.11 recurring paroxysmal pain, good fat in the middle and old age, and volatile, the patient is very painful.

The primary trifacial neuralgia (trigeminal neuralgia, TN) has the paroxysmal fierce ache which manifests suddenly repeatedly in the trigeminal or trifacial nerve distribution area, good sends in the middle and old age, the easy relapse, the patient to be extremely painful.

Idiopathic trigeminal neuralgia (trigeminal neuralgia,TN) occur in paroxysmal trigeminal nerve distribution in the District of repeated seizures in severe pain, Ho fat in middle and old aged, repeatedly, the patient is very painful.