The Bleeding Love hitmaker has opened up about the terrifying health condition that stopped her straightening her hair.

The 32-year-old began straightening her naturally curly hair shortly after signing her first record deal when she was just 20.

But now, she reportedly refuses to put straightening irons anywhere near her thick mane.

“Gradually I started wearing my hair straight too, especially on photo shoots, where a lot of stylists didn’t know what to do with curly hair,” she said in Glamour.

But about a year and a half ago, after straightening her hair for years, Leona began experiencing symptoms of chronic fatigue, along with pains in her neck and throat.

“It was a pretty hard time, and after a bunch of tests, I found out I had an autoimmune condition called Hashimoto’s disease, which affects mostly women,” she wrote.

The condition leads to chronic thyroid damage with symptoms including fatigue, weight gain, sensitivity to cold, and aches.

“When my symptoms were the most severe, I could hear my body telling me that I needed to slow down. I also started to feel tired during performances.

“I began taking medication but also turned to Ayurveda [my mum is a master herbalist] to help heal my body naturally,” she wrote.

“I just got to a point where I wanted to start over physically and emotionally. I started eating better and I stopped straightening my hair.”