The 33-year-old singer said she was constantly "worried sick" during her school days, reported Female First.
"Kids just don't have the courage to talk to someone. I was just a general worrier, it's in my nature, I would worry about the world, I'd worry sick if I saw something on the news. I was quite a depressed teenager to be honest, I didn't enjoy them at all. Worried about exams, everything. I worried I was going to be failure.
"Your hormones play a huge part in your teenage years of how you feel. I wouldn't go back to my teenage years for love nor money," Cheryl said.
"It breaks my heart to think that you're in that much pain that you turn to harming yourself as a release. It's a massive, massive problem.
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