A marking body, a method for producing a marking body and a method for using a marking body are disclosed. In an embodiment a marking body includes a self-expanding structure of a shape-memory metal, wherein the shape-memory metal forms a tubular structure that has at least two elongated openings along its length that extend no further than from a head section to a foot section of the tubular structure, wherein the tubular structure comprises at least one stripe of the shape-memory metal located between two adjacent elongated openings, and wherein the tubular structure is configured to be compressed when in an application condition and configured to be stretched when in a non-application condition.
