Reed Rhizome Chinese Herb
Reed Rhizome (Lu Gen): A Cooling Herb for Thirst, Fever, and Lung Heat
Introduction
Reed rhizome, known as Lu Gen (芦根) in Traditional Chinese Medicine (TCM), is a sweet and cold herb used to clear heat, generate fluids, and promote urination. It is particularly helpful in cases of high fever, dry mouth, thick phlegm, or difficulty urinating due to heat. Gentle yet effective, Lu Gen is a key herb in formulas targeting Lung and Stomach heat.
What Is Reed Rhizome?
Lu Gen is the fresh or dried rhizome of Phragmites communis, the common reed that grows in wetlands throughout Asia. In TCM, it is classified as sweet and cold, and it enters the Lung and Stomach meridians. It is traditionally used to clear heat from the upper and middle burners, promote the generation of body fluids, and ease heat-related urinary difficulties. Its moistening nature makes it a favorite in febrile conditions with dryness.
Health Benefits of Reed Rhizome
Clears Heat and Generates Fluids
Used to treat fever, thirst, dry mouth, and irritability caused by heat damaging the fluids.
Clears Lung Heat and Eases Cough
Helpful for cough with thick, yellow sputum or chest tightness due to heat in the Lungs.
Relieves Nausea and Upset Stomach
Soothes rebellious Stomach qi and can calm nausea and vomiting in febrile illnesses.
Promotes Urination and Eases Difficult Urine
Useful for hot, painful urination or scanty urine caused by damp-heat in the bladder.
Supports Recovery from Febrile Disease
Often used in the recovery stage of heat illnesses to replenish lost fluids and clear residual heat.
How to Use Reed Rhizome
In Decoctions for Fever, Cough, or Thirst
Use 15–30 grams fresh or 9–15 grams dried with herbs like Zhi Mu, Tian Hua Fen, or Jie Geng. Simmer for 20–30 minutes.
In Heat-Clearing Formulas
Included in formulas like Bai Hu Tang or Qing Zao Jiu Fei Tang for high fever or dryness.
In Herbal Teas for Lung and Stomach Heat
Sometimes consumed as part of cooling teas to moisten dryness and relieve sore throat.
Where to Buy Reed Rhizome
You can find Lu Gen at the following places:
- Chinese herbal medicine stores
- Natural health markets or fever-relief apothecaries
- Online retailers such as Amazon, iHerb, or TCM specialty suppliers
Look for:
- Thick, fibrous pieces that are pale white or beige in color
- Clean, mold-free, and properly dried or refrigerated if fresh
- Wildcrafted or organically grown rhizomes preferred
Are There Any Side Effects?
Reed rhizome is very safe and well-tolerated. However, due to its cold nature, it should be used with caution in those with cold-type digestive weakness or yang deficiency. May cause loose stools if taken in large amounts.
Conclusion
Reed rhizome, or Lu Gen, is a cooling and fluid-generating herb in TCM used to relieve fever, thirst, lung heat, and heat-related urinary issues. Its sweet, moistening properties make it ideal for clearing residual heat, soothing inflammation, and replenishing body fluids after illness.
FAQs
Can I take reed rhizome every day?
It can be taken short-term during heat-related illness or dryness but is not typically used daily long-term.
What does reed rhizome taste like?
It has a mildly sweet and refreshing taste with a cool aftereffect.
Is reed rhizome safe for children?
Yes, in smaller doses, especially for high fever, sore throat, or dehydration, under practitioner supervision.