An apparatus (200, 300, 400, 500) for supplying a substance (433, 533) to the skin tissue (250 450), comprising: - a housing (210, 310, 410, 510) defining a lower surface flat configured to contact a skin surface of the skin tissue (250, 450)； - at least one opening (280, 380, 480, 580) provided on the flat bottom surface (260, 360, 460, 560) of the housing (210, 310 410, 510)； - a supply arrangement (230, 330, 430, 530) provided in the housing (210, 310, 410, 510), the supply arrangement configured to deliver the substance (433, 533) under elevated pressure through at least an opening (280, 380, 480, 580) on the skin surface of the skin tissue (250, 450)； and - at least one low pressure channel (222, 322, 422, 522) provided on the flat bottom surface (260, 360, 460, 560) of the housing (210, 310 410, 510) proximal and surrounding at least a portion of at least one opening (280, 380, 480, 580), wherein the low pressure channel (222, 322, 422, 522) is configured to apply a reduced pressure sufficient to maintain contact between the flat bottom surface of the carcass and the skin tissue surface (250, 450) in order to position at least one opening (280, 380, 480, 580) against the skin tissue surface (250, 450) when the pressure reduced enough to maintain contact between the flat bottom surface of the housing and the skin tissue surface (250, 450) is provided in the low pressure channel (222, 322, 422, 522), characterized in that at least one opening (280, 380, 480, 580) and at least one low pressure channel (222, 322, 422, 522) are in coplanar alignment at arg of the flat bottom surface (260, 360, 460, 560) of the housing (210, 310, 410, 510), so that a portion of the flat bottom surface (260, 360, 460, 560) of the housing (210, 310, 410, 510) separates at least one opening (280, 380, 480, 580) from at least one low pressure channel (222, 322, 422, 522).Un aparato (200, 300, 400, 500) para suministrar una sustancia (433, 533) al tejido de la piel (250 450), que compren
