As if dealing with Simon Cowell wasn't enough of a pain, Britney Spears has another embarrassing ailment: The 'X Factor' judge and pop icon is reportedly living with psoriasis.

It turns out that stress from her 'X Factor' duties may be what's actually causing her psoriasis to strike. “Britney has had the skin condition for a long time, but it only flares up when she’s under extreme pressure,” a source revealed. “Now she can’t seem to stop scratching and picking at the sores. She has a psoraisis skin cream, but she says it burns, so she stopped using it.” Poor BritBrit!

Another source said it's not just the filming of the show that stresses the 'Til the World Ends' singer out -- it's also watching herself. "Britney had a chance to watch herself judging 'The X Factor' and she’s really self conscious about it all,” the second source said. “She’s terribly nervous and thinks people are laughing at her and making fun of the way she talks. She’s trying her best not to be so nervous, but she can’t help it.”

Thankfully, Spears has not only her adorbs and adoring fiance Jason Trawick on her side, but also Simon, who loves working with the Southern belle. “Simon’s a big help and has bent over backwards for Britney and made every single accommodation Britney has requested," the source added. "He knows she’s the show and a bigger draw them himself so whatever she wants, she gets. She has even asked that the cameras don’t show closeups of her hands anymore because she bites her nails constantly.”

Thank goodness Simon was cooperative with Spears -- if he wasn't, she may well have indeed quit the show on day one!