A red tongue without moss and a dry tongue is a sign of yin deficiency. For kidney yin deficiency, choose Zhi Bai Di Huang Wan, and for lung and kidney yin deficiency, choose Mai Wei Di Huang Wan. In Chinese medicine, Zhi Bai Di Huang Wan and Mai Wei Di Huang Wan both belong to the yin nourishing drugs, however, the two for the specific internal organs are different. Although red tongue without moss and dry tongue belongs to the manifestation of yin deficiency, it is necessary to combine with other symptoms to determine which medicine to choose. If accompanied by lumbar and knee soreness (lumbar and knee soreness and weakness), hot flashes (a burst of fever), night sweats (sweating abnormally after going to sleep, after waking up sweating stops), dry mouth and sore throat, tinnitus, spermatorrhea, urination (urine is small in volume and dark yellow in color), etc., considered to be a deficiency of kidney yin, you can choose to Zhi Bai Di Huang Wan treatment. This medicine should be taken with caution by pregnant women. It is not suitable for patients with deficiency and cold conditions. And if it is accompanied by hot flashes and night sweating, dry throat, cough and weakness, hemoptysis, dizziness and tinnitus, lumbar and knee pain and weakness, etc., it is mostly lung and kidney yin deficiency, and can be treated with Mai Wei Di Huang Wan. It is not suitable for patients with cold and fever. People with hypertension, heart disease, liver disease, diabetes, kidney disease and other serious chronic diseases should take under the guidance of a physician. The adverse reactions of the above drugs are not clear, it is recommended to strictly follow the doctor’s instructions to take medication, do not self-medication.