Zara McDermott has revealed she is in hospital suffering from "excruciating pain".
The Love Island star, 25, took to Instagram on Saturday from her bedside after heading to A&E in the early hours of the morning.
Zara revealed doctors suspect a cyst has burst in her ovary and she is awaiting further tests.
Taking to Instagram, Zara looked downcast as she lay with a catheter in her arm and wrote: "Wow last night was so eventful!
"Sam had to rush me to A&E because I had excruciating pain in my abdomen - had a feeling it was a burst cyst on my ovary because I've had it before on my other side and it felt similar.
"I just want to say the A&E team were just incredible. I was seen so quickly and had all tests and scans done within two hours of being there."
"They wanted to keep me in overnight but after all the pain relief I felt a lot better so I had a few hours in bed before heading back this morning for another few scans.
"They want to make sure my ovary isn't twisted as I was presenting with all symptoms last night.
"But likely burst cyst, which if you have had it before is excruciating."
According to the NHS, ovarian cysts are fluid-filled sacs that can grow on the ovaries. Most cysts are harmless and disappear without treatment.
It comes after the star vowed to change the content she uploads on social media after fans complained about her documentary as she appeared on TV last week.
Viewers of her documentary, Disordered Eating, called the project 'tone-deaf' as she explored the impact of influencers' posts on people struggling with eating disorders.
However, some viewers praised the reality star for understanding she was 'part of the problem and wanting to fix it.'
She told BBC Breakfast presenters Charlie Stayt and Tina De Healy that she was 'trolled quite badly' due to her weight when she finished Love Island.
"I wasn't the smallest girl there but I was a perfectly healthy weight but sadly the trolls decided to tell me I was too big," she said.
Zara added: "I then went on my own health and fitness journey and lost some weight as a result of that.
"I wasn't suffering from an eating disorder myself but I knew there was a massive demand for weight loss content so I was just posting not knowing the detrimental impact it was having on my followers. I was just meeting the demands for that content."
She was asked to elaborate on what the 'detrimental impact' was and she said that social media can 'have a huge impact on the development [of eating disorders]' and that her posts and many others could have 'triggered' someone.
Zara explained: "It's tough because I want to share my life I'm still passionate about eating healthy but it's about finding that balance in life."
The TV personality added that posting bikini pictures 'every once in a while' is fine as long as it's not your entire page.
