Hi. 23, male. woke up this morning, and as i moved my neck there was a big crunch and grinding. no pain. some grinding still 1hr on, but less so.

The neck/cervical: spine joints, like all joints, are bathed in an oily-like substance called synovial fluid which facilitates smooth movement. Theories about crepitus (these noises) include changes in synovial joint fluid pressure or gaseous bubbles forming or bursting. Or sounds from ligaments or tendons as they move over bones, etc. Bone on bone grinding due to worn down cartilage from arthritis very rare at 23.