Formation of bullae is considered a rare variation or manifestation of chickenpox. This report describes three cases of varicella bullosa. All patients had the usual initial symptoms of chickenpox and all had had known contact with chickenpox. Each bulla appeared to develop from a single chickenpox vesicle of the usual configuration. The bullae appeared in crops, and scattered over the intervening skin were normal pocks in various stages of development. Constitutional symptoms were relatively mild, significant complications were absent, and the course of the disease was under two weeks. None of the patients showed bullous involvement of the mucous membranes. The authors do not agree with others who consider the disease bullous impetigo, nor do they consider it pemphigus acutus, but rather a rare manifestation of chickenpox.
Saslaw S, Kluck C, Prior JA. VARICELLA BULLOSA. JAMA. 1960;173(11):1214-1217. doi:10.1001/jama.1960.03020290040008