Banks was ill-prepared emotionally to write the song and as a result she made herself physically sick. She explained to Refinery29
"I was telling myself I was really angry to cover up how hurt I was and then this song came out. And it was really sad because my heart was broken but I didn't want to say that because anger is so much easier to feel than sadness and heartbreak and missing the s--t out of someone when you hate them at the same time. So that's how this song was birthed. I still don't like listening to it now.
I didn't listen to it for months after I wrote it because it just made me nauseous. But I was never tempted to leave it off the album. I was proud of myself after I wrote it."