What is that sound or where does it comes from when you move your head and your neck is going “knarr knarr” ( kinda the sound when you walk on dry snow). And why is it there, sometimes?

Question

Right now I have shoulder and neck issues and this sound is making me wonder these questions.

In: 59

Answer 1

It is Crepitus ([wikipedia page](https://en.m.wikipedia.org/wiki/Crepitus)) which is where we get “decrepit”.

[Decrepit](https://www.etymonline.com/word/decrepit) (adj.) “broken down in health, weakened, especially by age,”