1. A device for determining a skin inflammation score or value, comprising an optoelectronic measuring instrument or device for directly taking a three-dimensional image of an inflammation area on human or animal skin, wherein area-related, space and color values of the three-dimensional image are directly detected by the optoelectronic measuring instrument, a processing or computing unit for calculating the skin inflammation score from the area-related, space and color values detected by the measuring instrument, and a display unit for displaying the calculated skin inflammation score, wherein the processing unit distinguishes the area-related values of the scanned three-dimensional image into an inflammation focus and a focus-surrounding area adjoining and surrounding the inflammation focus by delimiting the color values of the individual pixels and by delimiting the space values of the individual pixels and in that each color value corresponds to a magenta value in the CMYK color model; wherein the scanned three-dimensional image of the inflammation area is comprised of a multitude of pixels arranged in a three-dimensional coordinate system in grid-like fashion, wherein each area-related value corresponds to a single pixel that is unique in the coordinate system; wherein both a single color value and a single space value are assigned to each area-related value of a three-dimensional image scanned by the optoelectronic measuring instrument; wherein each space value corresponds to a height value of the respective pixel in the three-dimensional coordinate system; wherein a relative overall color value of the inflammation focus is determined by comparing the averaged color values in the inflammation focus and the averaged color values in the focus-surrounding area; wherein the optoelectronic measuring instrument or device is a 3D sensor; wherein a relative overall volume value of the inflammation focus is determinable by comparing averaged space values in the inflammation focus to averaged space values in the focus-surrounding area; wherein the relative overall volume value is a comparative value of the surface roughness in the inflammation focus to the surface roughness in the focus-surrounding area.