Although Liuwei Dihuang Pill is a traditional Chinese medicine for tonifying kidney, it is mainly suitable for patients with yin deficiency and hyperactivity of fire. Yin deficiency refers to the deficiency of qi and blood and the decline of the function of internal organs, while hyperactivity of fire refers to more hot air in the body. In short, Liuwei Dihuang Pill can nourish yin and tonify kidney, which is suitable for patients with kidney yin deficiency and can be used for all symptoms caused by kidney yin deficiency. In addition, Liuwei Dihuang Pill is not suitable for patients with kidney-yang deficiency, and it is better to take it under the doctor's advice if the spleen and stomach function are not harmonious ~