The 25-year-old "Grateful" singer took to Instagram to post a picture of her in hospital.
In the photo, she lay in a hospital bed wearing a white T-shirt while hooked up to an IV.
She still smiled despite looking tired. "Today was pretty tough but I'm getting through it thank you to all of you for the support! I love you!! #exhaustionisreal," she captioned it.
It's unclear how her condition is.
Hours before the hospital visit, Ora documented her activity during what appeared to be the filming of an ad for the new underwear collection of Tezenis.