One in a hundred people suffer from Tourette's Syndrome, a neurological condition which causes physical and verbal tics.
Wales This Week has spent time with 17-year-old Joe Holloway, from Denbigh. His Tourette's has affected his family, his schooling and his life. He wants people to better understand how his condition affects his behaviour.
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Adrian Masters and Owain Phillips present Monday's programme from Birmingham and Cardiff.