You don’t check the color of your skin
Your skin changes color depending on what stage of frostbite you have. The first stage, also called frostnip, causes your skin to turn red and numb, but doesn’t leave permanent damage. Superficial frostbite turns the skin pale or white. If your skin begins to feel warm at this point, it’s time to take serious action and get treatment for frostbite. If left untreated, the skin tissue could turn black and die, and joints or muscles may lose function.
Don’t forget about hypothermia
When you’re protecting yourself against frostbite (the freezing of skin, muscle, or nerve tissue), remember to look out for signs of another, more serious condition. Hypothermia is when your core body temperature drops. It’s very rare to die from frostbite, but hypothermia can be potentially fatal. Symptoms include slurred speech, shivering, confusion, and clumsiness. Take these hypothermia first aid measures to treat someone you suspect has hypothermia.