Danni, who starred in TOWIE last year, spent New Year's Eve at her new restaurant in Essex, but fell poorly last night (1 January).
After being taken to hospital, Danni tweeted a photograph of herself attached to a drip while lying in bed.
Alongside the picture, the restauranteur commented: "Why me x."
Danni also told her followers: "Can't believe I have ended up in hospital, meant to be at the airport at 6am please god make me better."
Since sending her tweets, Danni has given no indication as to what is wrong with her, however she has received lots of get well messages from her friends and fans.
Danni's sister tweeted: "Wishing my sister better @MisPark_Dempsey get your butt out of hospital you have a holiday waiting!! Xxx"
Kirk Norcross' ex-fiancèe Cami Li also said: "No bueno! Hope it's not too serious."
Prior to her hospital admission, Danni hinted that she wasn't feeling well: "Wow last night really took it out of me I just woke up again so sleepy X" she tweeted.
Get well soon, Danni.