Abstract: A system for decreasing symptoms of primary dysmenorrhea of a female person/patient. Such system includes an electrical assembly configured for attachment at an acupoint BL57 on each posterior calf skin of the patient proximately mid-length between the ankle and knee region of the patient. Each electrical assembly includes a heating element, a temperature sensor, a heat radiator for dissipating heat generated by the heating element, and an energy source. A pulse generating controller including a computer having logic circuitry powered by the energy source and carried by and arranged in electrical communication with the electrical assembly. The controller operates each heating element through a set or series of immediately consecutive heating and cooling cycles.