Katie Piper, 35, posted a selfie of herself in a hospital robe to share the news about her health to her 865,000 Instagram followers.
The former Strictly Come Dancing contestant said she had “ignored some symptoms” due to being busy, but added she is being looked after by NHS staff.
She wrote beside the picture: “Ignored some symptoms because of being too busy and now I am in hospital with a bad infection!
“Moral of the story, always listen to your body. I am being looked after by some fantastic NHS nurses and doctors as always.”
Katie was inundated with well wishes from his fans and fellow celebrities with Good Morning Britain presenter, Susanna Reid, writing: “Loads of love Katie.”
Amanda Holden said: “Darling.. take care.”
While Rochelle Humes added: “Wishing you better x.”
The previous night, Katie was out in London to present an award at the British Podcast Awards.
The star shared images from her evening to her Instagram account, where she stunned in a monochrome trouser suit.
She captioned the post: “About last night! I presented an award @britishpodcastawards and my podcast series Katie Pipers Extraordinary People got Bronze in the Spotlight category, thank you @coachkamranbedi for being the perfect date.”
Katie added: “My suit is @topshop Shoes @houseofcb Styled by @jamesyardley Hair @chris88hair Make up @toby_salvietto Picture credit @gettyimages.”