Is the tongue milky white a symptom of kidney deficiency?

The milky white tongue may be the symptom of kidney deficiency, kidney deficiency can be divided into kidney yang deficiency and kidney yin deficiency. The tongue of patients with kidney yang deficiency is generally red with little coating or no coating. The tongue of patients with kidney yin deficiency is generally pale and white with thick coating, but it cannot be diagnosed as kidney deficiency according to white coating of tongue. It also needs to be differentiated according to other symptoms.