Iontophoresis is used to treat hyperhidrosis  on the hands, feet , armpits and the face. During  Iontophoresis  the patient  sit with both hands or both feet, or one hand and one foot, immersed in shallow trays filled with tap water ( without any pharmaceutical substance ) for a short period of time (15 to 40 minutes depending on the device) while the device sends a small electrical current through the water.  After a few sessions   hyperhidrosis  is significantly reduced and after 10-12 stops totally .