Hello everyone. I'm currently teaching my sister (she's 14), and we're working a lot on her technique. She has recently been getting faster in her technique, and a couple of days ago she mentioned that she was experiencing some weird movement in her wrist. Specifically, when she increased the speed on her arpeggios, her right wrist was cracking or popping on the way down, during the third-finger-over-thumb transition. The cracking is not audible, but she says it feels the same as when you crack your knuckles or ankles (she never cracks anything intentionally). Her wrist sort of clicks, and she said that it feels strange.
I do not know much about this stuff (not a very experienced teacher), so if any of you could provide insight that would be helpful. (I've told her to skip arpeggios in her practices for a bit).
Would this motion/cracking hurt her wrists? (she is primarily a violinist and values her wrist movement a lot)
Also, is there a way to get rid of it? I told her to have a loose wrist, but she says her wrist is already very loose, and it seems unavoidable. She is doing a correct motion of the wrist and arm while going through this transition.