No, but social anxiety can lead to depression, and vice versa. People who experience social anxiety may endure extreme unhappiness, self-doubt, and even hopelessness, symptoms which overlap with those of depression. But research on the two conditions reveals a core feeling of worthlessness, or feeling that one is undeserving, whether of happiness or of other people’s friendship. Addressing that symptom in therapy could help to address social anxiety before it triggers depression.