Third degree frostbite: Deep frostbite is the next stage, in which the skin can appear blue and mottled, and numb to pain and cold. Blood-filled blisters can form. Muscles next to the area might ...

Related: Frostbite: Treatment for Mild to 1st-Degree Symptoms Certain people are at higher risk of developing frostbite than others. Risk factors for frostbite include: When your body is cold ...