Does the polarity be changed in an iontophoresis treatment?

Yes, the polarity can be changed during an iontophoresis treatment. Iontophoresis involves the use of electrical currents to drive charged ions into the skin, and the polarity of the electrodes can be switched to alter the direction of ion movement. This allows for the delivery of different medications or therapeutic agents, as positively charged ions are repelled by the positive electrode and attracted to the negative electrode, and vice versa for negatively charged ions. Adjusting the polarity helps optimize the treatment for various conditions or substances.