The Destiny's Child singer has taken to heart her feud with fellow judge Tulisa Contostavlos, according to The Sunday Mirror.
"Tulisa and I have no relationship. The show has become a living hell. I don't know how long I can tolerate this for," the 30-year-old is quoted as saying by a supposed friend.
The source explained: "None of Tulisa's acts go anywhere near Kelly on set. Kelly was told to 'stay out of it' by Tulisa when she offered advice on her acts two weeks ago and it's been frosty between them ever since. Kelly's just not used to this in-fighting and bitching.
"She's feeling extremely uncomfortable with Tulisa and doesn't feel like she can approach her to make amends - it's like Dannii Minogue and Sharon Osbourne all over again.
"Simon [Cowell] has been calling Kelly and trying to calm her down but she hates the way Tulisa is portraying her in the press and the way she's creating an awful atmosphere backstage.
"The past two weeks have been hellish. Simon has had to work hard to stop her jacking it all in. But Kelly is no pushover, and can easily look after herself."
Rowland and Contostavlos originally fell out over claims that Misha B has been bullying other contestants.
Her representative has asserted that Rowland, who has been replaced by Alexandra Burke this weekend due to a "throat infection", has not quit The X Factor.