Wu Ling San has the effects of inducing diuresis and seepage of dampness (promoting the operation of water to get rid of dampness), warming yang and transforming qi (warming yang qi in the body). It is mainly used for the treatment of oedema caused by yang not transforming qi (the body’s qi is blocked), internal storage of water-dampness (water-dampness stagnating in the body) and common symptoms such as dysuria (irregular urination), oedema and abdominal distension. Wu Ling San is composed of Gui Zhi, Poria, Poria, Zedoaria and Atractylodes. Gui Zhi is pungent, sweet and warm, with the effect of warming the meridians and helping Yang to transform qi; Poria is sweet, light and flat, with the effect of inducing water and seeping dampness; Poria is sweet, light and flat, with the effect of inducing water and eliminating oedema; Ze Xie Diaphragm is sweet and cold, with the effect of inducing water and seeping dampness; Atractylodis Macrocephalae is sweet and bitter, and is warm, with the effect of invigorating the spleen and benefiting the qi. The combination of all the medicines, the total effect of diuresis and seepage of dampness, warming the yang and transforming the qi. It should be used with caution for people with spleen deficiency and dampness, and should be selected under the guidance of a doctor.