First Degree: Skin turns red and feels very cold.
Second Degree: Skin turns white or very pale, and blisters may appear upon warming.
Third Degree: Area turns black and hard as tissue dies.
FIRST AID
• Avoid rubbing the area, especially with snow.
• Don't walk on frostbitten feet or use a frostbitten hand.
• Avoid thawing the affected area if you are far from help or if there is a chance of refreezing.
• To thaw, immerse area for 20-45 minutes in tepid water; never use hot water.
• Do not put salves or creams on frostbite.
Source: Hennepin County Medical Center
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More From Star Tribune
More From Local
High Schools
Fall or spring, it's Rochester Mayo's year in prep tennis
The Spartans have the top-ranked boy and a high team ranking now, after producing individual and team champs during the girls season.
Local
Minneapolis reaches $150k settlement with eyewitness of George Floyd's murder
Donald Williams, a former MMA fighter, has several criminal cases pending.
Local
Israel-Hamas war creates 'really fraught times' at Minn. colleges
The latest conflict is happening thousands of miles away. But debates over Palestinian rights and antisemitism hover over U.S. college campuses, including the University of Minnesota.
Local
Rare and fatal brain disease in two deer hunters heightens concerns about CWD
A team of researchers said the cases hint at a potential contamination from infected venison. CDC says link is unlikely.
Politics
911 transcript gives more detail of Sen. Mitchell's alleged burglary
A caller now identified as Mitchell's stepmother told a dispatcher she "tripped over" a person who was on the floor next to her bed. That person was later identified as the DFL senator.