Abstract: A bandage cooling apparatus has a bandage, a container, a casing, a valve and an actuator. The bandage has a first temperature. The container contains a gaseous fluid and has an exit. The casing comprises a chamber which contains the bandage, an inlet and outlet which both defines passages from the chamber and through the casing. The outlet has a removable lid. The valve connects the inlet of the casing to the exit of the container. The actuator operates the valve whereby a portion of the gaseous fluid expands from the container into the chamber through the valve upon operation of the actuator such that the bandage gets to a second temperature which is different from the first temperature.