Neck Crepitus: Popping, Cracking, and Grinding Noises

Neck crepitus refers to the sounds (often described as popping, cracking, grinding, or snapping) that are heard when moving the neck. These noises can happen during normal movements such as turning the head, tilting the neck, or simply stretching, and are commonly described as painless, however sometimes they can be accompanied by mild discomfort. But what causes it, and when should you be concerned?