Frostbite

Frostbite is the localized medical condition where freezing cold temperatures damage skin and other tissue. It is most likely to happen in body parts farthest from the heart and in body parts with large exposed areas with many blood circulations. It most often occurs in toes. It may be seen along with Hypothermia.

Also, if the affected parts are not amputated, the person is likely to suffer from a disease called gangrene. 

References

 Other websites 

Category:Health problems

Category:Mountaineering and health
Category:Skin conditions resulting from physical factors
Category:Thermal medicine
Category:Weather and health
Category:Causes of amputation
Category:Wikipedia medicine articles ready to translate
Category:Wilderness medical emergencies