Kim Kardashian has finally admitted to getting bum injections - but not for what you might think.

The 35-year-old revealed she gets regular cortisone shots in her backside to treat a skin condition she's had since her teens: psoriasis.

The Keeping Up With The Kardashians star believes an unfortunate photo taken of her in 2007 (which showed a giant dent in her butt) first triggered rumours she'd undergone derrière-enhancing surgery.

During a livestream on her website yesterday, she explained: "I went to go get a cortisone shot in my butt. I lived right behind Kitson [the boutique in Los Angeles]. One of my neighbours was a dermatologist at Cedars.

Kim Kardashian has revealed she suffers from psoriasis. Photo / Instagram
Kim Kardashian has revealed she suffers from psoriasis. Photo / Instagram

"I go in there and he's like, 'There's a one in a billion chance that you will get a huge indent in your butt.' Of course I get a huge indent on my butt."

The mum-of-two, who is married to rapper Kanye West, continued: "There is a picture of me in Miami wearing an electric blue dress, and another picture of me walking down Robertson.

"You see the indent. And I think that's when the rumours started, 'She's had implants'."

Admitting that she had an injection recently, Kim said: "Every few years I get a cortisone shot. And it's so funny. I just got one as my psoriasis was so bad in Vegas.

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"That's a little unknown fact of me - I have to get cortisone shots every few years."

The social media diva has never kept her skin battle a secret, revealing she needs to use thick moisturiser "all the time".

"I have this at-home LED light therapy machine called Quasar MD Plus that I got for my psoriasis because I'll try anything. I used to have it so bad on the back of my legs," she told beauty blog Into The Gloss last year.

"I had a lingerie photo shoot once, and it was just covering my legs. I have the behind-the-scenes pictures, and it's pretty crazy. Now I just have two patches that won't seem to go away, but the rest have gone away ever since I had the baby."

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