In this video, a St John Ambulance trainer explains the signs frostbite, and how to help someone who is suffering from frostbite. Frostbite happens when parts of the skin and other tissues freeze due to low temperatures. Frostbite usually affects the fingers and toes as they are the parts of the body furthest from the heart. Find out more about frostbite: Learn more life saving skills with St John Ambulance first aid training courses: For more information follow us on Twitter or Facebook #FirstAid #HowTo #Frostbite