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。

As far as that goes, I don't mind telling you that I've got neuralgia from sitting in that park with my feet in the damp grass.

就此而言，不介意告诉在那个公园里，脚踩在潮湿的草地上得了神经痛。