(Courtesy of Dr. Amy Paller | Northwestern University via AP) This April 3, 2020 photo provided by Northwestern University shows discoloration on a teenage patient's toes at the onset of the condition informally called "COVID toes." The red, sore and sometimes itchy swellings on toes look like chilblains, something doctors normally see on the feet and hands of people who’ve spent a long time outdoors in the cold.