Why do my fingers turn purple and throb when wearing tight rings in the freezing cold?
1. Introduction Your fingers turn purple and throb when wearing tight rings in the freezing cold due to a compounding sequence of physiological vasoconstriction and physical venous obstruction. Freezing temperatures trigger the sympathetic nervous system to drastically narrow the blood vessels in the extremities to conserve core body heat. Concurrently, the rigid metal of a … Read more