The TV presenter and campaigner shared a photo with fans showing her in the ward and wearing a hospital gown.
She told fans: "Back down to theatre for me this morning - praying today may be the last operation on my throat for a while. Nearly there :)."
Although Katie was hoping that today would be her last surgery for a while, she soon told fans that she would have to go back for another operation.
She updated them two hours later, saying: "It wasn't my day today - require further surgery next week, C'est la vie!'
Mum-of-one Katie also spent a few days in hospital last month for pre-scheduled operations.
Remaining in good spirits, she said a sign on the hospital wall, which read: "Keep calm and stop worrying… You are in the safe hands of best professionals", had been reassuring.
Katie has had multiple surgeries since 2008 when an ex-boyfriend arranged for acid to be thrown in her face.
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