Rhizome of Nutgrass Galingale Classic Formulas … Natural Herb Library

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Spreads Liver qi and relieves constraint ... Xiang Fu is a classic herb for chest, flank, epigastric, or emotional stagnation patterns marked by distension and discomfort.
Regulates menstruation and alleviates pain ... it is widely used for dysmenorrhea, irregular cycles, breast distension, and qi-stagnation gynecologic patterns.
Harmonizes the middle burner and reduces abdominal distension ... traditional use extends to nausea, poor appetite, and Stomach discomfort when Liver-Spleen disharmony is prominent.

Liang Fu Wan ... classic pairing of Xiang Fu with Gao Liang Jiang for stomach-cold pain with qi stagnation.
Liver-constraint menstrual formulas with Chai Hu, Bai Shao, or Dang Gui ... used when pain, mood, and cycle irregularity travel together.
Qi-regulating combinations with Chen Pi or Fo Shou ... traditional strategy for distension, nausea, and poor appetite from constrained Liver-Spleen qi.

Traditional herbology describes Xiang Fu as a neutral qi-regulating herb that excels in Liver constraint and menstrual pain.
It is sometimes called the holy medicine of gynecology in later literature, but its real strength is broad qi regulation rather than being limited to one body system.