Chilblains are a vasospastic condition of the small arterioles that commonly affect the toes when there is a too rapid change in temperature for the blood vessels to respond to the changes.

Chilblains Resources:
http://www.foot-health-forum.com/forum/showthread.php?t=3059 (ask a question at the Foot Health Forum)
http://www.footstore.com.au/chilblains/32/
https://croydonfoot.com/chilblains-season-is-here/
https://www.itsafootcaptain.com/beetroot-juice-for-chilblains-say-what/
https://thescienceandmyopinion.com/chilblains-the-science-and-my-opinion/
http://podchatlive.com/episode-80-chilblains/