Frostbite is an injury to the skin following freezing cold exposure. Complaints that the skin hurts are common. The length of time to get frostbite depends on the temperature and moisture. The stages of cold exposure determine skin damage. If superficial exposure occurs, the skin is red and clear blisters may develop. If deep frostbite occurs, blood blisters occur. The final determination of the frostbite’s damage to the tissue takes 1-3 months. Demarcation is clear at that time.