Lalang Grass Rhizome

Traditional Use

Primary Actions

• Cools blood and stops bleeding - Bai Mao Gen is classically used for hematuria, nosebleed, hemoptysis, and other bleeding driven by heat in the blood.
• Clears heat and promotes urination - it treats painful urinary dribbling, damp-heat urinary irritation, edema, and heat stranguria, especially when bleeding is also present.
• Clears Lung and Stomach heat and generates fluids - traditional use extends to cough from Lung heat, vexing thirst, vomiting from Stomach heat, and recovery fluids depleted by heat.

Secondary Actions

• Fresh Bai Mao Gen is often considered stronger for cooling blood, generating fluids, and stopping bleeding than the ordinary dried slices.
• The herb is gentle enough to sit near the medicine-food boundary in many regions, which helps explain its wide use in teas and convalescent drinks.

Classic Formulas

• Mao Gen Yin Zi - classic formula context for hematuria and blood strangury with both heat and deficiency components.
• Bai Mao Gen with Xiao Ji, Ce Bai Ye, or Di Yu - common hemostatic pairing style for upper- and lower-body bleeding with heat signs.
• Fresh Bai Mao Gen juice or single-herb decoction - traditional emergency-style use for blood-heat bleeding or severe thirst from heat.

Classical References

• Traditional references describe Bai Mao Gen as sweet and cold, entering the Lung, Stomach, and Bladder to cool blood, stop bleeding, clear heat, and induce diuresis.
• The Shen Nong Ben Cao Jing lineage preserves it as a longstanding non-toxic grass-rhizome medicinal rather than a modern folk invention.
• Bai Mao Gen should be distinguished from Lu Gen: both clear heat and generate fluids, but Bai Mao Gen is much more bleeding- and urinary-heat oriented.