At this time of year as many of us work in unheated buildings, outdoors and/or on roofs with limited warm areas, frostbite and hypothermia are ever-present hazards. Frostbite is the result of ice crystals forming in your cellular tissue. It is readily distinguishable by a white or grayish-yellow skin tint and the lack of pain or feeling in the affected skin tissue area. Blisters often appear. The areas of the body primarily affected are the fingers, toes, ears, cheeks, and nose. A person who has frostbite once is more likely to get it again than someone who has not had it before. The injured part of the body may become forever sensitive to cold and must be protected from further frostbite.