Songfacts®:

• Some will listen to this song and relate it to relationships they've had in their lives. However, Kiiara actually wrote "Open My Mouth" about the relationship she has with herself.
  
  When I open my, open my, open my mouth
  I let you down, down
  
  Kiiara said: "I've struggled with mental health issues for my entire life. I've felt silenced, I've felt alone, and I've felt afraid. To me, this song is about facing these realities and putting it all out there. It feels empowering to open up and finally speak my truth, and I hope in doing so I can encourage others to let their guard down and do the same, so they don't feel so alone and helpless."
• Kiiara wrote the song with:
  
  Amy Allen (Halsey's "Without Me," Selena Gomez' "Back to You").
  
  Scott Harris (Shawn Mendes' "There's Nothing Holdin' Me Back" and "In My Blood").
  
  Ian Kirkpatrick (Nick Jonas' "Levels," Dua Lipa's "New Rules").
  
  Joe London (Tom McGraw & Faith Hill's "Speak To A Girl," Jason Derulo's "Wiggle").