Rebecca Brown (beckie0) has spoken to BBC News about trichotillomania and how YouTube helped her cope.
The 21-year-old YouTuber has made videos documenting her struggle with the condition which makes sufferers pull their hair out.
She told BBC News: “I couldn’t really talk to counsellors. YouTube just appeared in my life, it became my counsellor.”
Rebecca said viewers have since opened up to her and written letters detailing their own stories.
She told BBC News: “It can be quite overwhelming because some of these people can’t speak to their parents or their friends – but they can talk to me.”
Watch Rebecca’s story on the BBC News website.