Who is at risk?
You are more susceptible to frostbite if you smoke, take medications called beta-blockers, have poor blood supply to the legs, or have diabetes or Raynaud syndrome, a condition in which strong emotions or cold temperatures cause blood vessels to spasm and block blood flow to extremities.
Older people and the homeless without proper clothing, heating and food are also at high risk, as are hikers and hunters who aren’t properly clothed and stay outdoors too long. The US Centers for Disease Control and Prevention also warns that anyone who drinks excess alcohol or uses illicit drugs is at high risk; while you may feel like your body is warmer, your core temperature and blood pressure actually drop.
And of course you are more likely to get frostbite if you aren’t dressed properly for the weather. The CDC has a visual chart that shows the critical areas to keep covered in extreme cold.