Singer and actress Miley Cyrus says a rare voice disorder called Reinke's edema is behind her famous raspy voice -- and also makes singing live very hard.

The 32-year-old pop star recently discussed the condition during an interview on Apple Music's The Zane Lowe Show, CBS News reported.

She described Reinke's edema as a type of "abuse of the vocal cords," and said she's had it for a long time.

"Being 21 and staying up and drinking and smoking and partying after every show does not help. But also, in my case, it does not cause it. My voice always sounded like this, so it's a part of my unique anatomy," Cyrus explained. "So I have this very large polyp on my vocal cord, which has given me a lot of the tone and the texture that has made me who I am."

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