Xian Mao (Golden Eye Grass Rhizome) is a hot, acrid herb in Traditional Chinese Medicine (TCM) best known for powerfully tonifying the Kidneys and strengthening Yang. It is derived from the rhizome of Curculigo orchioides and has been used for centuries to restore vitality, improve fertility, and treat musculoskeletal weakness due to Kidney Yang deficiency. Xian Mao is considered one of the strongest warming tonics in TCM, particularly suitable for cold-related lower back pain, weak knees, impotence, and urinary difficulty. It is also valued for its ability to strengthen tendons and bones while enhancing overall physical endurance.
Functions & Benefits
Warms and Tonifies Kidney YangReinforces the body’s core warmth, alleviates symptoms of Yang deficiency such as cold extremities, fatigue, and low libido.
Strengthens Tendons and BonesImproves lower back and knee strength in chronic weakness or degenerative joint conditions.
Dispels Cold and DampnessRelieves pain, stiffness, and heaviness in the lower body caused by cold-damp accumulation.
Supports Reproductive HealthEnhances fertility and sexual function in cases of cold-related reproductive weakness.
Indications (Who Can Benefit from It?)✔ Individuals with cold lower back and knee pain due to Kidney Yang deficiency.✔ People with chronic fatigue, cold extremities, and low vitality.✔ Men with impotence or reduced fertility from cold deficiency.✔ Those with joint pain or stiffness from cold-damp conditions.
Tongue & Pulse Diagnosis in TCMTongue: Pale with a thin white coating, indicating cold and Yang deficiency.Pulse: Deep and slow, reflecting deficient Kidney Yang.
Related TCM PatternsKidney Yang Deficiency – Causes coldness, weakness, sexual dysfunction, and low energy.Cold-Damp Obstructing the Channels – Leads to pain, stiffness, and heaviness in the lower body.
Clinical Applications (For Reference Only)Chronic Lower Back Pain – Warms and strengthens the lower spine and hips.Cold-Induced Impotence – Restores sexual function by tonifying Kidney Yang.Weak Knees and Legs – Improves strength and mobility.Cold-Damp Joint Pain – Reduces pain and stiffness in cold weather.
Common Herbal Formulas with Xian MaoFrequently combined with Yin Yang Huo and Ba Ji Tian for Yang deficiency, or with Du Zhong and Xu Duan for strengthening bones and tendons.
Precautions & ContraindicationsAvoid in cases of Yin deficiency with heat signs.Not suitable for use during high fever or internal heat.Use with caution during pregnancy.
Lifestyle & Dietary Recommendations✔ Eat warming foods such as lamb, cinnamon, and ginger to support Yang energy.✔ Avoid cold, raw, or icy foods that weaken Kidney Yang.✔ Stay warm in cold environments to protect the lower back and kidneys.✔ Engage in gentle strength-building exercises to maintain musculoskeletal health.
ConclusionXian Mao (Golden Eye Grass Rhizome) is one of the strongest Kidney Yang tonics in TCM, known for restoring warmth, strengthening bones and tendons, and improving reproductive health. It is especially suited for chronic cold-related weakness, musculoskeletal pain, and low vitality.

