"his chilblained feet"
Public DomainChilblains - Credit: Sapp, Wikimedia Commons

Chilblains, also known as pernio, perniosis or erythma pernio, is a condition whereby the skin develops small, itchy red ulcers in response to cold and humidity. It may also be brought on by exposure to very sudden changes in temperature.

The ulcers usually develop on the body's extremities, such as the toes, fingers, nose and earlobes.