#BBCtrending: The six-year hair pulling selfie
21 July 2014 Last updated at 13:46 BST
A selfie project documenting a young woman's battle with a hair-pulling disorder has been watched more than five million times on YouTube.
21-year-old Rebecca Brown from Essex took a photo of herself every day for six years to show how she'd been affected by trichotillomania - a condition which leaves a person feeling compelled to pull their hair out.
Brown has been on YouTube since 2007 and has almost 200,000 subscribers on her channels. She tells BBC Trending about how she uses social media to cope.
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