The 23-year-old singer - who was seen with scratches on her arms recently - used to cut herself when she was younger.
She told Q magazine: "It's a funny thing, a morbid curiosity. I'm talking about when I was nine. What does that feel like? 'Ow, that f***ing hurts.' It's probably the worst thing I've done." The 'Rehab' singer says she sometimes drinks too much when she is feeling depressed and ends up "slapping" herself.
She revealed: "Not punching myself in the face, but slapping. I drank a whole bottle of champagne and then just got depressed. I didn't feel like I looked good. And I'm quite self-destructive when I'm drunk." Amy also says she enjoyed the pain of getting her 13 tattoos.
She explained: "It's a way of suffering for the things that mean a lot to you. Actually I like the pain. To me, it relieves you."