About This Herb*
Traditional Chinese Medicine background and properties
Herb Description*
Cinnamon bark is one of the most powerful warming herbs in Chinese medicine, prized for strengthening the body's core warmth and circulation. It is commonly used for people who feel deeply cold, have low back pain, cold hands and feet, poor circulation, or painful periods caused by cold. In small doses, it also helps boost the body's vitality when added to tonifying formulas.
Herb Category*
Main Actions*
- Tonifies Kidney Yang
- Guides Fire Back to Its Source
- Dispels Cold and Alleviates Pain
- Warms the Channels and Disperses Cold
- Tonifies Qi and Generates Blood
How These Actions Work*
'Supplements Fire and assists Yang' (补火助阳) means Rou Gui powerfully strengthens the body's warming, activating force, particularly in the Kidneys. In TCM, the Kidneys house the 'Gate of Vitality' (Mingmen), the root source of all warming and metabolic activity. When this fire weakens, people experience deep cold in the limbs, low back weakness, low libido, frequent pale urination, and chronic fatigue. Rou Gui is one of the key herbs for reigniting this foundational warmth. It works gently and persistently rather than explosively, making it suitable for chronic deficiency rather than acute collapse.
'Leads Fire back to its source' (引火归元) is one of Rou Gui's most distinctive actions. When the Kidneys are too weak to anchor Yang, it can 'float upward' and produce misleading signs of heat in the upper body: a flushed face, sore throat, mouth sores, or red eyes, while the lower body remains cold. This is called 'false heat above, true cold below.' Rou Gui draws this displaced warmth back down to the Kidneys where it belongs. This is why a warming herb like Rou Gui can paradoxically resolve what looks like heat.
'Disperses Cold and stops pain' (散寒止痛) refers to Rou Gui's ability to drive out deep, stubborn cold that causes pain. Cold makes things contract and stagnate, leading to cramping abdominal pain, cold stomach discomfort, or aching joints. Rou Gui's hot, pungent nature penetrates deeply to warm the interior and relieve this type of pain. Even used alone as a powder dissolved in warm water, it can rapidly warm a cold stomach.
'Warms and unblocks the channels and vessels' (温通经脉) means Rou Gui enters the blood level and restores circulation where cold has caused stagnation. This is especially relevant for painful periods from cold stagnation, cold-type hernial pain, joint pain from cold-damp obstruction, and yin-type abscesses (deep, pale, slow-healing sores) where blood flow is blocked by cold.
'Encourages the generation of Qi and Blood' (鼓舞气血生长) refers to a subtle but important use: when added in small amounts to tonifying formulas for patients with chronic weakness and depleted Qi and Blood, Rou Gui acts like a spark that reinvigorates the body's production of these vital substances. It catalyzes the effectiveness of other tonic herbs.
Patterns Addressed*
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Rou Gui is traditionally associated with these specific patterns.
The following describes this herb's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.
Why Rou Gui addresses this pattern
Rou Gui is one of the premier herbs for Kidney Yang Deficiency because its hot, sweet, and pungent nature directly enters the Kidney channel and powerfully supplements the Mingmen Fire (the fundamental warming force housed in the Kidneys). When Kidney Yang is deficient, the body loses its ability to warm itself and metabolize fluids. Rou Gui reignites this foundational fire gently but persistently, restoring warmth to the lower back and limbs, supporting reproductive function, and strengthening the Kidneys' ability to grasp Qi for normal breathing. Its action is gentler and more sustained than Fu Zi (Aconite), making it well-suited for chronic Kidney Yang depletion.
A practitioner would look for one or more of these signs
Persistent coldness of the hands and feet, especially the lower limbs
Chronic soreness and cold sensation in the lower back and knees
Reduced libido, erectile dysfunction, or cold uterus with infertility
Clear, copious urination, worse at night
Wheezing or breathlessness due to failure of the Kidneys to grasp Qi
Why Rou Gui addresses this pattern
When both the Spleen and Kidney Yang are depleted, digestion fails and internal cold predominates. Rou Gui enters both the Spleen and Kidney channels, and its hot, sweet nature directly warms and tonifies both organs. The sweet taste nourishes the Spleen, while the hot, pungent properties drive out deep cold and restore the digestive fire. Rou Gui's ability to warm the Middle Burner relieves cold-type abdominal pain, poor appetite, and watery diarrhea. Its Kidney-warming action simultaneously addresses the root of the problem, since Kidney Yang (the 'Gate of Vitality' fire) is what warms and supports Spleen function.
A practitioner would look for one or more of these signs
Cold, cramping pain in the stomach or abdomen, relieved by warmth
Chronic loose stools or dawn diarrhea with undigested food
Poor appetite and reduced food intake
General aversion to cold with cold extremities
Why Rou Gui addresses this pattern
Cold causes contraction and stagnation. When cold invades the channels or the body's Yang is too weak to keep blood moving, blood stasis results, causing fixed, often severe pain. Rou Gui's pungent, hot nature is specifically suited to this pattern because it enters the blood level and powerfully warms the channels, breaking through cold obstruction to restore blood flow. Its warming action addresses the root cause (cold) while its channel-entering, blood-moving quality addresses the consequence (stasis). This makes it particularly useful for cold-type painful periods, cold hernial pain, and cold-damp joint pain.
A practitioner would look for one or more of these signs
Menstrual pain with cold sensation, improved by warmth, dark clotted flow
Absence of periods due to cold stagnating the blood
Joint or limb pain worsened by cold and damp conditions
Cold hernial pain in the lower abdomen
Why Rou Gui addresses this pattern
This pattern arises when Kidney Yang is so deficient that it can no longer be anchored in its lower position and floats upward, creating misleading signs of heat in the upper body while the lower body remains cold. Rou Gui's unique action of 'leading Fire back to its source' (引火归元) directly addresses this disconnect. By warming and strengthening the Kidney Yang below, Rou Gui draws the displaced warmth back to where it belongs. This is a sophisticated application where a hot herb is used to resolve what appears to be heat, because the true root problem is cold and deficiency below.
A practitioner would look for one or more of these signs
Red, flushed face with cold lower body, a classic 'false heat' presentation
Dizziness and vertigo from upward-floating deficient Yang
Sore throat or mouth ulcers in a person who otherwise shows cold signs
Restlessness and insomnia from Heart-Kidney disconnection
TCM Properties*
Hot
Acrid / Pungent (辛 xīn), Sweet (甘 gān)
Bark (皮 pí / 树皮 shù pí)
This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.