Abstract: A transcutaneous electrical nerve-stimulation therapy apparatus and method having absolute protection for the patient from shock and automatic operation. The apparatus may operate in three modes, either controlled by timer, operating continuously or put in an automatic mode where the timer is automatically reset when the probe is removed from the patient and then recontacted. A circuit is provided for checking the continuity between the patient and the probes before each and every stimulation pulse. These pulses are generated at the same frequency and with a constant phase shift from the stimulation pulses. At the start of each set of stimulation pulses, the pulses are slowly ramped up over a 4-5 second interval so as to prevent any initial jolt to the patient. The device may also be used to locate appropriate application points on the patient's body. The pulses applied are variable current pulses having a fixed voltage.