Tourette's campaigner John Davidson, the inspiration behind the film I Swear, has made headlines around the world because of tics related to Tourette's syndrome. But what is the everyday reality of living with the often unpredictable condition?
For 22-year-old Seren Jaye, her tics dictate whether she leaves the house or not.
She experiences motor twitches, such as jaw jerks, vocal tics and coprolalia - involuntarily using obscene or offensive language - which she says can be "embarrassing" when she's in public.
Silence or needing to be quiet is "really, really difficult", she says.
"I can't go into a library.
