Why Does My Jaw Pop When I Open My Mouth Wide?

Ever open your mouth wide to yawn or take a big bite of a sandwich, only to hear a distinct pop or click from your jaw? You're definitely not alone. This is a super common thing, and while it can be a bit startling, it's usually nothing to freak out about. So, why does my jaw pop when I open my mouth wide? It all comes down to your temporomandibular joint, or TMJ for short. Think of it as the hinge that lets your jaw move up, down, and side to side. When this joint, or the little disc of cartilage inside it, moves just right (or sometimes, not so right), you get that popping sound.









