Postherpetic neuralgia ( PHN) is sequela of acute herpes zoster. The skin damage has recovered, but violent pain remains as an altauna to aged patients, who are subject to pain for long-term, with depression and tendency of committing suicide. 带状疱疹后遗神经痛(postherpeticneuralgiaPHN)是急性带状疱疹的后遗症,皮损愈合但仍有剧烈的疼痛,患者长期遭受疼痛折磨,情绪低落,甚至有自杀倾向。