Generally, a white tongue is a sign of Yang deficiency. However, if there is cold evidence, blood deficiency, etc. can also be manifested as white tongue. Yang deficiency refers to the pathology of the body’s yang qi weakness, reduced or weakened functions, reduced metabolic activity, low body reactivity, and lack of yang heat. If there is a loss of fluid retention, resulting in internal stoppage of water and overflow of water, the tongue is white, and it may be accompanied by coldness (fear of cold and cold limbs), pale face, loose stools, weak pulse, white face, swelling, and a pale, fat and tender tongue. In case of yin deficiency, which is characterized by deficiency of yin fluid, resulting in yin not controlling yang and internalized deficiency heat, the tongue can be seen as having less fluid, less moss, and a reddish tongue. If the tongue is white due to yang deficiency, drugs such as Jin Gui Ren Qi Pill, Gui Sui Di Huang Wan and Yu Gui Wan can be taken; Specific medication should be taken under the guidance of a doctor. If there are any uncomfortable symptoms, you should consult a doctor for evidence-based treatment under the doctor’s guidance.