An apparatus for treatment of skin, comprising: at least two bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) having an end face for contacting the skin of a user moving relative to each other; and an assembly for driving the movement of said at least two bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) with respect to each other in a back and forth in a bi-directional manner movement, the back and forth in a bi-directional manner movement being along the plane of the skin when the apparatus is positioned so that the bristle tuft rows end face contacts the skin, with a frequency of the back and forth in a bi-directional manner movement within a range of 80 Hz to 200 Hz, such that when the apparatus is positioned so that the bristle tuft rows end face contacts the skin, the back and forth in a bi-directional manner movement of the bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) with respect to each other on the skin removes undesired material (211, 213, 215) from the skin pores, wherein the back and forth in a bi-directional manner movement of said bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) is driven in one of: - a linear back and forth movement, or - an arcuate back and forth movement or an elliptical back and forth movement with the axis of rotation perpendicular to the surface of the skin, wherein a peak-to-peak amplitude of the movement of the bristle tufts measured at the base of the bristle tufts is within the range of 1,27 mm (0,05 inches) to 6,35 mm (0,25 inches) with bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) having center-to-center spacing of 2,54 mm (0,1 inches) to 6,35 mm (0,25 inches). at least two bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) having an end face for contacting the skin of a user moving relative to each other; and an assembly for driving the movement of said at least two bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) with respect to each other in a back and forth in a bi-directional manner movement, the back and forth in a bi-directional manner movement being along the plane of the skin when the apparatus is positioned so that the bristle tuft rows end face contacts the skin, with a frequency of the back and forth in a bi-directional manner movement within a range of 80 Hz to 200 Hz, such that when the apparatus is positioned so that the bristle tuft rows end face contacts the skin, the back and forth in a bi-directional manner movement of the bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) with respect to each other on the skin removes undesired material (211, 213, 215) from the skin pores, wherein the back and forth in a bi-directional manner movement of said bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) is driven in one of: - a linear back and forth movement, or - an arcuate back and forth movement or an elliptical back and forth movement with the axis of rotation perpendicular to the surface of the skin, - a linear back and forth movement, or - an arcuate back and forth movement or an elliptical back and forth movement with the axis of rotation perpendicular to the surface of the skin, wherein a peak-to-peak amplitude of the movement of the bristle tufts measured at the base of the bristle tufts is within the range of 1,27 mm (0,05 inches) to 6,35 mm (0,25 inches) with bristle tuft rows (59, 28, 70, 72, 80, 90, 92, 100) having center-to-center spacing of 2,54 mm (0,1 inches) to 6,35 mm (0,25 inches).