Chickenpox and shingles are usually diagnosed based on the way that the skin lesions appear, but the diagnosis can be confirmed by using the Tzanck test to look for multinucleated giant cells in the fluid of the vesicles.

水痘和带状疱疹一般可以根据皮损特点诊断，赞克氏实验可以用来确诊，即寻找疱液中是否存在多核巨细胞。