"Save me. Mizzy," she wrote alongside a photo of her with gauze in her mouth and two icepacks resting on her cheeks.
"Ouch swoll AF," she added on another selfie of her heading home from the oral surgeon's office.
The 22-year-old former Disney darling also showed all five of her teeth after they were pulled.
"RIP. We feel you, girl. We really do," she added.
Cyrus is reportedly dating Patrick Schwarzenegger.