United Kingdom, June 30 -- Olivia Munn developed trichotillomania over a paparazzi shot.

The 44-year-old actress suffers from the disorder that causes a long-term urge to pull out one's own hair and has a;ways "immediately regretted" doing so but admitted that it all came from the first time she was in the tabloids with then-boyfriend Chris Pine.

Speaking on the Armchair Expert with Dax Shepard podcast, she said: "There's a sensation. It's probably not even real, but I'll feel like, 'Oh, this eyelash feels like it's gonna come out,' even though it's not.

"And then when you pull it, there was a quick second of pain. And then there's a satisfaction and then immediate regret.

"So there was a paparazzi shot of he and I, and it was the fir...