Stigma, is a process by which the reaction of others spoils normal identity according to Goffman. It is a discrepancy between actual and virtual social identity that causes us to altar our estimation of others negatively. Stigma is something that is deeply discrediting, but it depends on the circumstances. A certain attribute that may stigmatize one person might be something that isn’t out of the ordinary for another person and it is therefore neither creditable nor discreditable in itself.
An example of social stigma is that: Someone might be stigmatized because they walk with a limp. This limp causes stigma to attach to the person, overpowering the ways in which they might be social normative. Maybe the person is white, Protestant, or a heterosexual with a limp. The limp marks them, despite his or her other traits.