It usually takes 4 weeks for the rash to disappear, but there can be pain in the affected dermatome which lasts for more than 90 days, called postherpetic neuralgia.

皮损一般需要4周，是被感染的皮节区疼痛持续可以超过90天，被叫做带疱疹后神经痛。

You can even use it for some pain conditions like trigeminal neuralgia.

你甚至可以将其用于一些疼痛况，叉神经痛。

And that eventually manifests in what is called pudental neuralgia.

这最终表现为所谓的阴部神经痛。

It's been about 15 years I've been suffering with trigeminal neuralgia.

我患叉神经痛已有大约15年了。