Hypoglaucous Collett Yam Rhizome Classic Formulas … Natural Herb Library

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Separates the clear from the turbid and drains dampness - Fen Bi Xie is used for cloudy urine, white turbidity, persistent damp leukorrhea, and other lower-burner damp conditions.
Dispels wind-damp and relieves painful obstruction - textbook usage extends to heavy, fixed, or swollen joint pain, especially when dampness is prominent.
Helps resolve damp-toxic skin patterns - older and modern teaching both include damp sores, eczema, and moist toxic lesions in its range.

Bi Xie Fen Qing Yin - classic formula context for cloudy urine and lower-burner turbidity in which Bi Xie is the signature herb.
Fen Bi Xie with Yi Zhi Ren and Shi Chang Pu - pairing logic for frequent cloudy urination with deficiency and damp obstruction.
Fen Bi Xie with Huang Bai, Ren Dong Teng, or Fang Ji - damp-heat or painful-obstruction strategy when urinary turbidity overlaps with swollen painful joints.

Official Chinese references state that both Mian Bi Xie and Fen Bi Xie are bitter and neutral, entering the Kidney and Stomach to dispel damp turbidity and relieve painful obstruction.
Traditional discussion repeatedly emphasizes white turbidity, leukorrhea, and damp-heavy joint pain rather than simple dry urinary irritation.
Because several species circulate under the name Bi Xie, identity control matters.