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I used to think chilblains were a kind of biscuit,

A quick WebMD diagnosis revealed that I had chilblains, a rare condition associated with Raynaud's syndrome, which is a vascular disorder.

Every winter we would develop painful chilblains on our fingers from the cold.

With the link between COVID-19 and chilblains still in question, some researchers point to the lockdown theory—that people spent more time at home barefoot early in the pandemic and got cold feet, literally.

Some people have observed the red or purple skin discoloration, known as pernio or chilblains, which can appear under the toe nails and has been called “covid toes.”