Demi Lovato is currently touring the world with DJ Khaled for her “Tell Me You Love Me” tour. Meanwhile, the pop star’s mom, Dianna De La Garza, is exposing her darkest secrets in her memoir, Falling With Wings: A Mother’s Story. In the tell-all, De La Garza exposes the nitty-gritty details of Lovato’s shocking downward spiral years ago – a time when the singer’s life was ruled by drugs, booze and harming herself.

Click through the gallery to read about the pop star’s trip to rock bottom.

SOURCE: BACKGRID

Lovato, now 25, has been open about her past struggles with substance abuse and harming herself. But De La Garza recalled the painful experiences of finding out how Lovato cut her own wrists. “Next to her on the clean sheets was a bloody rag. I felt as though someone had slapped me in the face. Demi had started cutting her wrists long before that morning,” the somber mother wrote.

SOURCE: BACKGRID

In 2010, Lovato shocked the world when she punched her back-up dancer, Alex Welch, in the face. De La Garza detailed the memory of Lovato apologizing to her mom via text for doing something wrong. At the time, the pop star’s mom didn’t know what she had done but assumed Lovato was going to kill herself. “Was she in her hotel room? Did she take a handful of pills? Did she cut too deep? Questions fly through my head so fast that I can’t think,” she wrote.

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Lovato’s been outspoken about struggling with an eating disorder. In the memoir, De La Garza recalled the warning signs. “Demi turned to food, mostly sweets, to ease her anxiety. One day a plateful of cookies might disappear, the next it might be several doughnuts. I never suspected anything.”

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De La Garza exposed the pop star’s teenage years being bullied at school. At the time, she confessed she told her daughter to laugh off their harsh words. “But Demi wasn’t laughing. Instead, she was starving herself,” she wrote.

SOURCE: BACKGRID

After Lovato’s sixteenth birthday, De La Garza recalled watching her daughter exhibit “willful and defiant behavior with increasing regularity.”