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Invigorates blood and regulates menstruation - Ze Lan is classically used for delayed menses, irregular cycles, dysmenorrhea, postpartum abdominal pain, and other gynecologic complaints rooted in blood stasis.
Promotes urination and reduces swelling - it is especially valued when edema, water retention, or postpartum swelling coexist with impaired blood movement rather than with simple dampness alone.
Dispels stasis and helps resolve swelling or early abscess patterns - older use extends to traumatic pain, localized swelling, and sore or tender masses where movement of blood is needed.

Ze Lan Tang lineages - traditional gynecologic strategy for menstruation problems and postpartum stasis.
Pairings with Fang Ji for postpartum edema - a classic-style combination when blood stasis and water retention overlap.
Ze Lan with Dang Gui, Dan Shen, or Yi Mu Cao - common blood-regulating pattern logic for menstrual pain, abdominal masses, or retained postpartum stasis.

Official Chinese references describe Ze Lan as bitter, acrid, and slightly warm, entering the Liver and Spleen to invigorate blood, regulate menstruation, promote urination, and reduce swelling.
Traditional teaching repeatedly places Ze Lan in postpartum and gynecologic formulas because it moves blood and fluids together without being as harsh as some stronger stasis-dispelling herbs.