Zuo Gui Wan is suitable for people with true yin deficiency accompanied by fatigue of the spirit (dysphoria) and dryness of the mouth. Zuo Gui Wan is effective in nourishing the kidney and tonifying yin. Zuo Gui Wan is a proprietary Chinese medicine composed of Radix Rehmanniae Praeparata, Semen Cuscutae and Radix Achyranthis Bidentatae. It is used for the treatment of deficiency labor caused by deficiency of kidney yin and loss of essence and marrow, with symptoms such as lumbar and knee soreness and weakness, spermatorrhea and ejaculation, spontaneous sweating (involuntary sweating during the daytime, which is aggravated by the slightest movement), night sweating (sweating abnormally after falling asleep, but sweating stops after waking up), and dryness of the mouth and tongue, with a red tongue and little moss, etc. It should be noted that taking this medicine has the effect of nourishing the kidney and tonifying the yin. It should be noted that, taking this medicine, avoid greasy food; should not be taken by patients with colds; pregnant women should not take, children are prohibited; taking the medicine for 2 weeks or during the period of no improvement in symptoms, or worsening of symptoms, or the emergence of new serious symptoms, the medicine should be stopped immediately and go to the hospital. Zuo Gui Wan needs to be applied after the Chinese medicine practitioner’s diagnosis, do not self-medication.