Frostbite, First Aid 

Frostbite occurs most often to those exposed to extreme cold, so people who participate in cold-weather outdoor activities or live in or travel to cold climates are most at risk. Frostbite can also occur in those exposed to high winds, those with poor circulation, those in cramped positions who have tight-fitting clothing or boots, and those suffering from fatigue. Additionally, certain diseases and medications, alcohol consumption, and smoking increase risk for frostbite.