When there are symptoms, there might be a characteristic tingling or burning sensation, called a prodrome, one or two days before the blisters appear.

如果有症状，可能表为一种特有的刺痛或灼烧，被称为前驱症状，发生在水前的一两天。

Child coming in the prodrome of measles will look like any other child with a cold.

患有麻疹的儿童，前驱症状与冒很像。

For recurring episodes, these treatments usually work best if taken when the prodrome starts; in other words, before the blisters develop, and high-dose intravenous antivirals may be given in more severe, or life threatening situations.

对于复发，在有前驱症状产生时使用药物能达到最好的治疗效果，也就是说，在水形成之前，在症状严重或生命垂危的情况下，运用高剂量静脉注射法给抗病毒药物。

Mild cognitive impairment, in fact, which is considered like a prodrome of dementia, a form of pre-dementia, if you will.

事实上， 轻度认知障碍被视为痴呆的前驱症状，即一种前痴呆状态， 如果你愿意这么理解的话。