Jessie J has opened up about the problems she faced with her health as a child as well as the stroke she suffered when she was just 18.
In an extract published in The Mail on Sunday from her autobiography 'Nice to Meet You', Jessie recounts how she spent the majority of her childhood in and out of hospital.
Jessie was diagnosed with an irregular heartbeat at the age of just seven and due to medical procedures to try and correct this; the singer was prone to seizures.
Jessie recounts:"I remember collapsing a lot and having seizures."
"I was a sickly, skinny girl who had a slight green tinge to her skin because of the drugs and who was always in and out of hospital."
Even though she spent most of her childhood unwell, Jessie would try her best hide the fact that she was sick.
She explained: "There would be times when I'd be acting normal and then I'd just collapse. It was only then that people would realise I wasn't well. I suppose I was good at covering it up and I know I'm very good at that now."
Jessie also opened up about the time when at just 18-years-of-age, she suffered a minor stroke.
The singer relayed: "I'd started having really bad shooting pains in my chest, I couldn't feel my right hand, my mouth wasn't moving much on my right side and my right eye was going blurry."
"I sat with the doctor and he said: 'I don't want to scare you, but I'm calling an ambulance, because you've had a minor stroke'. I was like, 'F***, that's dramatic! I thought I had a cold!"
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Although her health has greatly improved these days, the busy pop star admits that she still has make sure she takes it easy from time to time.
She said: "My health isn't as bad now as it was before. Nowhere near. But there are still moments when I have to make sure I'm looking after myself and not pushing myself too hard. I have to be realistic."
'Nice to Meet You' is out this Thursday.