From the YINA Materia Medica — a living library of the TCM plants, read in two languages at once: the classical and the molecular.
THE ENTRY
Chinese — 香附 (xiāng fù), "fragrant attachment" Also known as — 香附子 xiāng fù zǐ, 莎草根 suō cǎo gēn
Botanical — Cyperus rotundus L., Cyperaceae
Pharmacopoeial — Cyperi Rhizoma / Rhizoma Cyperi
Category — 理气药, herbs that regulate qi
Nature — neutral
Flavor — acrid, slightly bitter, slightly sweet
Channels — Liver, San Jiao, Spleen
Actions — spreads Liver qi · regulates menstruation · relieves pain
Common names — nut grass, purple nutsedge, coco-grass
Part used — dried rhizome, lifted in autumn
FIELD NOTES
Cyperus rotundus has a famously poor reputation — agronomists have called it the world's worst weed. Thought to be native to Africa, southern Europe, and southern Asia, it has since spread across every warm continent. Its underground tubers carry viable buds capable of producing new shoots, allowing the plant to return even after its visible growth has been removed. To a herbalist, though, this persistence is the point. The plant survives by moving around obstruction — traveling sideways, finding the opening, and carrying on. It's almost exactly what xiang fu is asked to do inside the body.
Snap a fresh rhizome and you understand it at once. The tuber is dense with aromatic oil: woody, faintly camphor-like, with a cool, bitter under notes. In Chinese medicine theory, aromatic medicinals are often associated with movement, dispersion and the transformation of stagnation.
THE CLASSICAL RECORD
Xiang fu first appears in the written tradition in the Ming Yi Bie Lu (Miscellaneous Records of Famous Physicians, c. 500 CE), and it reaches its full stature a thousand years later in Li Shizhen's Bencao Gangmu (1596) where it’s often quoted:
气病之总司，女科之主帅
The commanding officer of qi disorders; the chief general of women's medicine.
The phrase speaks to Xiang Fu’s unusually broad importance in patterns of qi constraint, particularly when menstrual or gynecological symptoms are involved. The pattern it governs is Liver qi stagnation (肝气郁结) — a picture many women will recognize: tension and stress, a feeling of fullness beneath the ribs, breasts that ache and swell in the days before a period, irritability, a cycle that comes early or late or clotted and cramping, a jaw held tight all night. It shows on the skin, too — flushing that rises with frustration, inflammatory bumps along the jaw and chin, and the diffuse facial darkening (黧黑斑, what modern medicine calls melasma) that Chinese medicine has long read as stagnation rising to the surface. The Liver channel governs the free flow of qi, and when that flow gets stuck,the skin is often where it surfaces.
THE PHYTOCHEMISTRY
The rhizome holds a rich mix of aromatic oils and other plant compounds. One of the most studied of these is α-cyperone, which in laboratory settings has shown it can calm inflammation, quieting some of the pathways the body uses to turn its inflammatory response on. This offers some molecular context for what Chinese medicine has long understood in its own language: that this is a herb for painful, constrained, stuck patterns. Researchers have also looked at Cyperi Rhizoma extract in cultured cells linked to endometriosis, where it appeared to influence inflammatory and adhesion-related pathways. These are early, encouraging signals rather than conclusions — not enough to call Xiang Fu a treatment, though in time, research may confirm what TCM has understood for centuries.
Its relationship with collagen points in a similar direction. In traditional wound-healing research, Cyperus rotundus has been shown to support collagen formation in repairing tissue, and its compounds can slow the enzymes that break collagen down. This work has so far been done in wound and cartilage models rather than in aging skin, so it's a promising direction rather than proof of a firming benefit — but an intriguing one. The traditional language of moving qi and relieving pain is not equivalent to the modern science of inflammatory signalling; yet together, these distinct perspectives offer a richer understanding of why Xiang Fu has remained an important medicinal plant for centuries.
AS AN INGESTIBLE
Xiang fu is rarely used on its own. It works best as a director within the great TCM formulas. One classic example is Yue Ju Wan (越鞠丸, Escape Restraint Pill), Zhu Danxi's five-herb formula for clearing the six stagnations. Xiang fu sits at the head, unbinding qi so the other herbs can go to work on blood, damp, phlegm, food, and fire.
A few cautions. Xiang fu is not the right herb for qi deficiency without stagnation, and it's used carefully in cases of yin deficiency with heat. This is a drying, dispersing herb, and over long courses it can deplete the very reserves it's meant to circulate. Herbal medicine belongs in the hands of a licensed practitioner — especially during pregnancy, with hormone-sensitive conditions, or alongside prescription medication.
AS A TOPICAL
Xiang Fu has been studied topically for its soothing, anti-inflammatory and tone-evening properties. Preclinical research suggests that its rhizome extracts and aromatic compounds may help calm inflammatory activity in the skin and support a more balanced-looking complexion.
Its active compounds are oil-loving, which means they sink naturally into skin and sebum. This is an extract that belongs in an oil or a balm, not in water.
ITS ROLE IN A YINA FORMULATION
Décolletage Treatment
We include Xiang Fu in our Décolletage Treatment as part of a TCM plant complex made for the ritual of massaging the neck, chest, breasts, and heart center. As the rich, buttery cream melts into the skin, take a moment to notice where you're holding tension — and invite movement back in. Xiang fu is the chief herb here, joined by forsythia, millettia vine, cowherb seed, and gypsywort, each chosen to move qi, promote circulation, and calm the skin. There's an order to this: in Chinese medicine, qi commands blood (气为血之帅), so the qi-mover leads, opening the road for the blood-movers that follow.
養生 · THE SEASONAL RITUAL
The practice. Warm a small amount of cream between your palms until the aromatics lift. Begin at the sternum. Work outward across the chest toward the underarm, then down along the ribs — this is along the path of the Liver channel. Keep the movements slow, circular, and unhurried. Let each exhale run a little longer than the inhale. Five minutes is enough.
This is yang sheng: nourishing life through small, repeated, unglamorous acts. The herb is only half the medicine. The other half is that, for five minutes, someone attended to you — and the person doing the attending was you.
SELECTED SOURCES
Li Shizhen, Bencao Gangmu (1596) · Ming Yi Bie Lu (c. 500 CE) · Bensky, Clavey & Stöger, Chinese Herbal Medicine: Materia Medica, 3rd ed. · Jung S-H et al., "α-Cyperone… inhibits LPS-induced COX-2 expression and PGE₂ production through the negative regulation of NF-κB signalling in RAW 264.7 cells," J Ethnopharmacol 147 (2013) · Zhang H et al., "α-Cyperone down-regulates NF-κB and MAPKs signaling, attenuating inflammation and extracellular matrix degradation in chondrocytes, to ameliorate osteoarthritis in mice," Aging (Albany NY) 13 (2021): 17690–17706 · Ahn J-H et al., "The Anti-Endometriotic Effect of Cyperi Rhizoma Extract, Inhibiting Cell Adhesion and the Expression of Pain-Related Factors through Akt and NF-kB Pathways," Medicina 58 (2022): 335 · Phytochemistry Reviews, "Phytochemistry, data mining, pharmacology, toxicology and the analytical methods of Cyperus rotundus L." (2023) · "Preclinical study of the topical anti-inflammatory activity of Cyperus rotundus L. extract (Cyperaceae) in models of skin inflammation," J Ethnopharmacol (2020) · Puratchikody A, Nithya Devi C, Nagalakshmi G, "Wound healing activity of Cyperus rotundus Linn.," Indian Journal of Pharmaceutical Sciences (2006) · "Topical Cyperus rotundus Oil for treatment of axillary hyperpigmentation: A randomized, double-blind, active and placebo controlled study."
This entry is offered for education. It is not medical advice and it is not a diagnosis. Please consult a licensed practitioner of Chinese medicine before beginning any internal herbs.
