Proposed is a self-current-generating
skin-applicable patch with a first area in contact with the
skin and a second area adjacent to and spaced apart from it, where either area contains a
biodegradable metal, decomposable and absorbable through
skin contact or reaction with tissue
moisture. The patch includes a first
electrode layer directly contacts the skin as a
thin sheet integrated with the first area and has at least one fluid-transferable penetration part, a second
electrode layer of a material with a different standard
reduction potential is positioned opposite a skin-contacting side, partially extending to connect electrically to the second area, and a support layer, a hydrophilic sheet of predetermined thickness, is positioned opposite the skin-contacting side, having an
ionic solution supported. Thus, sufficient
iontophoresis and other micro-current effects with active ingredients are achieved through self-generated micro-current, even without a battery-like external power source.