The condition, also known as "hair-pulling disorder," involves recurrent, irresistible urges to pull out hair.

Olivia Munn has spoken about her struggle with Trichotillomania, a disorder causing hair pulling, and linked it to a paparazzi incident with Chris Pine.

Munn spoke about her experience with trichotillomania – a mental health condition that “involves frequent, repeated and irresistible urges to pull out hair from your scalp, eyebrows or other areas of your body,” according to the Mayo Clinic – while appearing on Monday’s episode of the “Armchair Expert” podcast.