"
Tell me where you're hiding your voodoo doll 'cause I can't control myself,
I don't wanna stay, wanna run away but I'm trapped under your spell.
And it hurts in my head and my heart and my chest,
And I'm having trouble catching my breath.
Ooh
A voodoo doll is a doll that makes people fell pain when/where the voodoo doll feels it, so by asking where she is hiding her voodoo doll, 5SOS is saying that she is making him love her with a voodoo doll.