For a teenage girl, Miley Cyrus sure has a lot of problems to share with the world. After revealing that writing her memoir was hard and confessing she was bullied in school, the 16-year-old singer disclosed she suffers from a heart condition.

In her autobiography titled "Miles to Go," Miley Cyrus admits that she suffers from tachycardia, meaning that the pop singer's resting heart rate is higher than the normal range.

"The type of tachycardia I have isn't dangerous. It won't hurt me, but it does bother me," she wrote. "There is never a time onstage when I'm not thinking about my heart."

Though tachycardia by itself is not deadly, it can be brought on by a variety of factors such as low blood pressure, the use of stimulants, and stress. If left untreated, it could lead to a real life case of heart break known as myocardial infarction.

Speaking of matters of the heart, Cyrus also dedicated a chapter to her "Prince Charming," who appears to be her ex-boyfriend Nick Jonas of whom she constantly spoke about in most interviews since the pair broke up.

"Wow! I was so in love," she wrote. "Do you know what I'm talking about? The kind of love where the sun could shine or not shine all day long and you wouldn't care."

After they split which Cyrus said happened because they were "so busy," she penned "7 Things I Hate About You," a song included on her latest album "Breakout."

"I was angry when I wrote 7 Things," she said, adding that she wanted to to punish him, to get back at him for hurting her. The song starts off as a list of she "hates" but it turns into a love song. "Why does he get a love song? Because I don't hate him," Miley wrote.