Carol Vorderman had bronchitis in the 'I'm A Celebrity ... Get Me Out Of Here!' jungle.
The former 'Countdown' host - who was eliminated from the competition earlier this week - secretly battled with a severe chest infection while she was taking part in the creepy-crawly show and her breathing got so bad at one point that she was administered antibiotics.
Speaking to The Sun newspaper, she said: "There's a coughing virus going around, you will have heard it. Mine got worse and worse and worse then on Saturday I had sharp chest pains so I asked to see Bob (the show's medic).
"It was like breathing through bubbles. Once I got the chest pains, I thought I need something. He immediately put me on really strong antibiotics, electrolytes and glucose tablets."
And, although she was advised to get some shut eye in her hammock to help her recuperate, the 55-year-old star didn't want to let on the public that she had a medically issue.
She explained "I was trying to do my jobs but they all kept saying just go to bed. I needed to just rest, rather than being in a rain forest. I was really unwell.
"It was a really bad proper chest infection. I'm still on the antibiotics now. You've got to remember you're breathing in smoke the whole time."
Despite her painful chest, Carol didn't let her illness affect her banter with camp mate Joel Dommett as the pair happily flirted up a storm in front the cameras on numerous occasions.
However, Carol has admitted she is totally single and has accepted a £250,000 offer to sign up to a new dating site in a bid to find her Mr. Right.
She said: "I'm the new a*se of Toyboy Warehouse. Yes, sign me up.
"Am I looking for Mr Right? Funnily enough, no. I meet a lot of men but I'm very happy. I think it's marvellous. I'm not out there looking for more occasional. I'm very happy as I am. I've had a few offers in my time. Some wanted, some not so wanted."
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