Katie, who stormed to victory in the reality show last week, spoke about the pain she went through during a chat on ITV's This Morning.
The former glamour model made no reference to reports from the weekend that she was rushed to Belgium for emergency surgery on her breast, but said of her time in the house: "They wanted to pull me from the show, I had a really bad medical problem."
Katie said she tried not to let her pain affect her time in the house, but admitted: "I didn't go on about it in the house, but I was in agony. I was on painkillers and antibiotics."
Mum-of-five Katie had a doctor on stand-by while in the house, and after leaving victorious last Friday, fans saw that she could barely move her arms because of the pain from her breast.
Reports over the weekend claimed Katie flew to Belgium in an attempt to have corrective surgery, after revealing that there was a hole from where her breast implant removal surgery had gone wrong.
Elsewhere, while in the house, runner-up Katie Hopkins described Katie's breast as smelling like a "dead hamster".
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