Cryotherapy is a pain treatment that uses the method of localized freezing temperatures to kill irritated nerves. Cryotherapy is used to also treat some cancer areas as well as abnormal skin cells by dermatologists. Cryotherapy works by climbing into a specialized chamber that harnesses the power of liquid nitrogen and refrigerated cold air. It will rapidly cool off your entire body and will stimulate your sympathetic nervous system through your skin’s cold receptors.