Alisma orientalis has the function of promoting diuresis and permeating dampness, and can be widely used for various water-dampness syndromes, including edema, dysuria, phlegm retention, stranguria, jaundice, eczema, dampness arthralgia, etc. Alisma orientalis is superior to Poria cocos and Coix seed, and is equivalent to Polyporus umbellatus. Alisma orientalis is slightly cold and more suitable for damp-heat syndrome. It can also purge fire, similar to phellodendron amurense.

Plantain seeds have many functions, mainly diuresis and stranguria, with obvious diuretic effect and good heat-clearing effect. Besides damp-heat stranguria, it is often used for edema. In addition, it can also stop diarrhea by permeating dampness, control water and diarrhea, and relieve oliguria. It also has the effects of clearing liver-fire, improving eyesight, clearing heat and resolving phlegm.

In addition, damp-heat stranguria refers to the fact that damp-heat evil is poured into the bladder, and the bladder gasification function is abnormal. Clinical symptoms include frequent micturition and urgency, burning pain in urethra, Huang Chi in urination and dysuria.