All conditions
Frostbite
Frostbite occurs when skin freezes due to exposure to extremely cold conditions. It's important to warm the affected areas as quickly as possible. Seek medical assistance if you suspect you or someone else has frostbite. Skin can be vulnerable to frostbite at temperatures of 0°C (32°F) or lower, with the fingers, toes, nose, and ears being the most commonly impacted areas.
Common symptoms:
Cold and firm
Numb, or you may feel a stinging or burning sensation
Painful, throb or ache
Red or pale (redness may be harder to see on black or brown skin)
Hard, frozen skin that can be white, blue or blotchy
Swelling and loss of feeling in the affected area
Blisters filled with blood or clear or milky fluid
The skin turns black and hard as it starts to die (this may be harder to see on black or brown skin)