Which frost bite stage is characterized by blisters and blue skin?

• A. First stage
• B. Second stage
• C. Third stage
• D. Fourth stage

Answer: (C)

Frostbite is graded by how deep the tissue injury goes. Blistering means the damage has reached below the epidermis into the dermis or deeper, and a blue or blue-gray skin color shows poor perfusion from deeper tissue injury. The mild form (frostnip) affects only surface nerves with numbness and red skin but no blisters. The superficial stage may have pale or mottled skin with clear blisters, but it doesn’t usually present with a blue discoloration indicating deeper involvement. When blisters occur together with blue skin, it signals that the injury extends into deeper tissues, which is characteristic of deeper frostbite. That’s why this combination points to the deeper, third-stage frostbite. The fourth stage involves complete tissue necrosis and more extensive damage, often with blackened tissue, not just blistering with blue skin.