READ MORE: ITV Coronation Street star Faye Brookes issues 'sad' relationship announcement The 31-year-old developed sudden onset tics when she was a teenager.
Opening up, Scarlett recalled the the "scary" time in her teens when she stood in the mirror and starred to try and stop her tics.
She said: "I remember being a young teen and standing in front of the mirror for hours, just staring in the mirror and trying to get my face to go straight and trying to stop the tics. "It was just really scary.
It's scary as a teenager anyway, because your body's changing, and you have all these hormones, but when you feel like you're not in control of them, I just remember feeling like 'God, is this ever gonna stop?