A competitor on the UK celebrity version of SAS: Who Dares Wins has sustained a rare and painful injury after a stunt on the show went horribly wrong.

X Factor singer Lucy Spraggon was left bleeding and in agonising pain on the notoriously hardcore reality show and now will have to undergo reconstructive surgery.

The show pits celebrities against each other, testing their resilience in a condensed version of a SAS selection course and is run by an elite team of ex-Special Forces soldiers.

Spraggon revealed the horrific extent of her injuries to The Sun, saying medics initially thought she had hurt her leg, but the reality was far worse.

“I ripped my labia – it was bad. That’s not a common injury,” the 34-year-old said.

“Actually, genuinely, that’s never been the same, so much so I’m having some surgery soon to correct it.

“I don’t really know even what happened, I guess the harness was tight.

“I was like: ‘This feels really bad. Surely there can’t be anything.’ And I looked and there was a tear, there was lots of blood and the doctor came over and I turned around because at that point you literally don’t care about anything. Dignity has gone. It was like: ‘Oh my God, I thought it was your leg.’ And I was like: ‘No, no, it’s not!’”

It wasn’t the only time she was injured on the gruelling series. Spraggon said she also nearly knocked out one of her teeth, got a black eye and fainted.

“I had the filler under my eyes and when my face hit the sea so hard my filler migrated to the side of my face,” she said.

“By that point I was just in pain everywhere…and the filler didn’t migrate back, when I got home I had to have it dissolved.”

Despite the injuries, Spraggon has called being on the show a ‘life goal’.

“I met some brilliantly brave and inspiring people and took part in things I never imagined I would get to do,” she wrote on Instagram.

“A truly unforgettable experience!”