Do kidney yang deficiency and kidney yin deficiency exist at the same time

Kidney-yang deficiency and kidney-yin deficiency can exist at the same time. This phenomenon is also called yin-yang deficiency syndrome in clinic. It is mainly caused by yin deficiency for a long time. It can usually be treated with Buzhong Yiqi Pill, Liuwei Dihuang Pill, Guifu Dihuang Pill and other drugs.