Trouble, (alternatively titled Trouble (Stripped)), is the fifth and final song off of Halsey's debut extended play, Room 93. It is also featured on the Japanese edition of her debut album, Badlands.
In the Room 93 Spotify commentary, Halsey said, "So we had a couple of versions of "Trouble" that were really big- and vindicated-sounding, but we kind of decided to just put this demo version on the EP instead because we felt like it had a lot more feeling. I think "Trouble" is one of the most emotional pre-chorus, choruses, I ever written in my life; "Let's cause a little trouble/Oh, you make me feel so weak/I bet you kiss your knuckles/Right before they touch my cheek." And that's a metaphor in itself, and it means that someone who takes pleasure and takes some, like, sadistic joy in making you feel bad and hurting you in a mental way. And I kinda took that and put it in physical words so you could really understand how sadistic and twisted it is to be in a relationship where someone enjoys hurting you and that's that line: "I bet you kiss your knuckles before you touch my cheek." It's this kinda like pompous, there's like a smirk; there's a smugness in this sense of like, this person is proud of what they're doing to you. But then the chorus is very vindicated and it says you know, "I've got my mind made up this time." You know it's about having control and wanting to leave and that's the thing that I sing about a lot. There's a lot of honesty in what I sing, but I also make sure that I never play the victim, and that my protagonist always has the option and the intention to leave and take care of themselves, and that's kinda what "Trouble" is to me."