Sweetness in the mouth is usually caused by physical weakness, often due to deficiency of qi, blood, or spleen, resulting in insufficient transportation and digestion, or digestion and absorption functions are impaired, spleen heat, liver qi stagnation, and kidney yang weakness can cause sweetness in the mouth, such as from the perspective of the identification of traditional Chinese medicine, sweetness in the mouth is usually found in the case of thirst, which is caused by yin and essence deficiencies. Sweetness in the mouth is caused by Yin essence deficiency, which can be treated by taking, for example, Liu Wei Di Huang Pill and Quenching Thirst Pill. From the point of view of western medicine, sweetness in the mouth should be checked for diabetes mellitus, which is characterized by sweetness in the mouth when blood sugar increases, and is accompanied by clinical symptoms such as thirst, excessive drinking, excessive urination, and emaciation.