Abstract: Head thermoregulatory apparatuses, related devices and methods, are disclosed herein. In some embodiments, a head thermoregulatory apparatus may include a core body temperature sensor; a head thermoregulatory device including a fluid pad, an input port, and an output port; a fluid device configured to heat or cool a fluid, the fluid device including the fluid, an input port, and an output port; fluid hoses between the head thermoregulatory device and the fluid device; a fluid valve coupled to the fluid hoses; and control circuitry coupled to the fluid valve and to the core body temperature sensor, wherein the control circuitry is configured to activate the fluid valve based on a determination that an absolute difference between a subsequent core body temperature and a baseline core body temperature exceeds a threshold. In some embodiments, the fluid device cools the fluid. In other embodiments, the fluid device heats the fluid.