Scouring Rush Herb — Classic Formulas
Mu Zei · Herba Equiseti Hiemalis
Primary Actions
- Disperses wind-heat and clears the eyes - Mu Zei is primarily used for red, swollen, painful, tearing eyes when wind-heat or Liver heat rises upward to the head.
- Improves vision and removes superficial visual obstruction - it is classically selected for nebula, corneal haze, pterygium-style overgrowth, blurred vision, and persistent cloudiness on the eye surface.
- Vents wind-heat from the head - when eye redness is accompanied by mild headache or irritability from upward-moving heat, Mu Zei helps direct the disturbance outward.
- Supports treatment of upper-body heat with bleeding or irritation - later materia medica sometimes extends its use to hemorrhoidal bleeding or hematemesis associated with heat, although its modern use remains overwhelmingly eye-focused.
Classic Formulas
- Mu Zei San - traditional eye-focused powder or decoction strategy for superficial visual obstruction, pterygium, or lingering wind-heat irritation.
- Mu Zei with Ju Hua and Chan Tui - common wind-heat eye combination for red, painful, tearing eyes with light sensitivity or headache.
- Mu Zei with Mi Meng Hua and Jue Ming Zi - vision-clearing pairing for corneal haze, glare, blurred vision, or superficial eye opacity.
- Mu Zei with Sang Ye and Bo He - exterior-releasing combination when eye redness appears together with wind-heat headache or early-stage upper-body heat.
Classical Text References
- Later materia medica classifies Mu Zei among herbs that disperse wind-heat upward and benefit the eyes, especially when there is redness, pain, or superficial visual obstruction.
- Traditional teaching particularly remembers Mu Zei for tui yi-style eye cloudiness and pterygium-like overgrowth, which explains why it appears more often in ophthalmic than in systemic formulas.
- Standard modern herbology texts keep Mu Zei in the exterior-releasing category but note that its clinical identity is much more eye-specific than that label alone suggests.