John Davidson (activist)

John Davidson, MBE (born 1971 or 1972) is a Scottish campaigner for Tourette syndrome. At age 16, Davidson was the subject of the BBC TV documentary John's Not Mad (1989) about the manifestations of Tourettes with which he lived. There have been a number of BBC follow-up documentaries throughout his life, as well as a film biopic entitled I Swear (2025).

Davidson is a "nationally known ambassador for the Tourettes condition", who gives talks and workshops for school pupils and teachers, and has organised an annual two-day residential Tourette camp for young people. In 2019 he was appointed an MBE in recognition of "his efforts to increase understanding of the condition and helping people deal with it across the country."