Frostbite is the occurrence of localized tissue freezing and injury. It res
ults following cold exposure of sufficient magnitude or duration to cause a
cute tissue damage. Although there are several conditions that predispose t
o frostbite, all are at risk if subject to sufficient cold exposure. We dis
cuss a case of frostbite presenting with bullae localized to the neck resul
ting from extreme cold encountered while snow-mobiling at night in Minnesot
a, an entity known by some local practitioners as "polaris vulgaris."