The present invention provides a treatment device for applying electrical impulses to a living body through the skin, for non-invasively treating a variety of clinical conditions. The device comprises a pair of electrodes for contact with the skin, and a waveform generator for repeatedly generating an AC waveform for applying electrical impulses through the electrodes to the skin. Means responsive to a resistance generated between the electrodes due to skin impedance detect the responsivity of respective zones of a pre-determined area of the body and produce output data representing the responsivity of each said zone. The apparatus also includes means for generating a treatment map (62) of the respective zones on the basis of the output data for the selection of a treatment zone having the greatest responsivity from amongst the respective zones. The waveform generator is thereafter operable for generating the AC waveform for administering a predetermined treatment through the electrodes at the selected zone.
