How is Frostbite Treated? Frostbite is something that you should be concerned about when the temperatures drop. When the temperature drops below zero frostbite can happen in as little as 30 minutes of exposure to the cold. And frostbite can happen in temperatures that are below freezing, not just temperatures below zero. It’s very important to wear appropriate clothing in the winter to protect your extremities and your face from frostbite. Diagnosis And Treatment ...