Actress Kaley Cuoco-Sweeting underwent sinus surgery as a result of her addiction to nose spray.

The Big Bang Theory star had the operation late last month (Dec14), and after posting photos on Instagram.com of herself in a hospital bed with a tube through her nose, she was forced to shut down rumours she had a nose job.

On Monday (12Jan15), she told comedienne Ellen DeGeneres on her talk show that not only did she have sinus surgery, it was caused by her odd penchant for nasal congestion spray.

Cuoco-Sweeting confessed, "I was addicted to (nose spray) Afrin. Like at awards shows, I would have to pick out the right clutch (bag) to be able to fit my Afrin in it. I'd be under the table, like, snorting it. I'm surprised there were no photos of me snorting.

"I couldn't get enough and it was such a problem. It ruined my sinus and I actually made it worse. The doctor said I had to stop."

After having the surgery, Cuoco-Sweeting complained that she hadn't been able to sleep, but her tennis pro husband Ryan Sweeting insisted that was not the case as she had been keeping him up with her heavy snoring.

To prove it, he recorded her dozing four nights in a row, and she was "truly shocked" by the snoring footage, which was played for the audience.

She added, "He was like, 'This has been my life this week.' I've been the worst wife."