My acupuncturist thinks I have a heart yin deficiency but she says that my condition is also very close to kidney yin deficiency. Therefore, I'm trying to determine what my underlying condition is in terms of TCM and I understand that kidney yin deficiency can cause heart yin deficiency. Additionally, I've felt a kind of sensation down to the core of my bones. I don't know how to quite describe it, but if I had arthritis and were an elderly man, it would feel like that. It's like some kind of heaviness or fatigue in my bones. My rheumatologist ruled out arthritis though which is why I've also turned my attention to TCM. I've always been trying to find an explanation for it ever since I started experiencing it a few years ago after college stress overwhelmed me, but I could never find any answers. Could it be a sign of kidney yin deficiency?