Can kidney yin deficiency and yang deficiency exist at the same time?

Kidney-yin deficiency and kidney-yang deficiency may exist simultaneously.

Kidney-yin deficiency is usually caused by deficiency of kidney-yin and loss of nourishment of the kidney, resulting in deficiency of yin fluid in the kidney, while kidney-yang deficiency is usually caused by deficiency of yang qi in the kidney, resulting in endogenous deficiency of cold. If kidney yin deficiency or kidney yang deficiency is not controlled and improved for a long time, it can lead to yin deficiency and yang or yang deficiency and yin deficiency, and then kidney yin and yang deficiency occurs. Clinical manifestations are soreness of waist and knees, dry mouth, frequent urination at night, fear of cold and cold limbs, edema of lower limbs, listlessness, etc. Therefore, kidney yin deficiency and yang deficiency may exist at the same time.