Three people from three different eras reveal what it's like to live with multiple personalities, or Dissociative Identity Disorder.
A retired librarian who lived through the disorder's most controversial time and has found peace as several parts; an early YouTuber who fought stigma about DID and now lives as one person; and a young TikToker navigating life as a 'system'.
The BBC has been sharing stories and tips on how to support your mental health and wellbeing. Go to bbc.co.uk/mentalwellbeing to find out more.
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