Rex Features
The 2006 contestant, 26, was diagnosed with the virus after coming home from Marbella on Monday, reports the South Wales Post.
"It's awful," said the glamour model. "I feel drowsy and need to sleep. Swine flu isn't exactly a good souvenir to bring back from holiday."
She is now reportedly in quarantine in her London flat and has been prescribed antiviral medication Tamiflu by doctors.
Thomas, who has become a regular fixture in lads' magazines since leaving Big Brother, was famously involved in a sex tape scandal during her time on the show.
