In Chinese medicine the Bladder receives fluids that the rest of the body has finished with, holds them, and discharges them. It's paired with the Kidney, belongs to the Water element, and its channel is the longest and most heavily used in the body, 67 points running from the inner corner of the eye to the outside of the little toe.
A quick note on spelling. We capitalize Bladder when we mean the Chinese medicine system and use lowercase for the anatomical organ. The functional overlap here is reasonably close. What is different is the channel. The Bladder meridian carries the back shu points, the row of points along the spine that connect to every one of the twelve organs, and nothing in Western anatomy corresponds to that.
You will also see it called the Urinary Bladder, and the points written UB rather than BL. They are the same channel.
On this page. At a glance · What it does · The meridian · The back shu points · Common patterns · Herbs · Questions
At a glance
The Bladder is the yang organ of the Water element, paired with the Kidney. In the twelve channel cycle it comes seventh, immediately before the Kidney.
| Chinese name | 膀胱 (Páng Guāng) |
| Element | Water |
| Yin or yang | Yang (fu) |
| Paired organ | Kidney (Shèn) |
| Season | Winter |
| Color | Black |
| Climate | Cold |
| Flavor | Salty |
| Emotion | Fear. In balance, the willingness to keep going. |
| Opens into | The ears, shared with the Kidney |
| Governs | Storing and transforming fluids |
| Qi moves | Downward and out |
| Peak hours | 3 to 5 p.m. |
| Meridian | Foot Taiyang, 67 points (BL1 to BL67) |
What does the Bladder do?
It stores and discharges fluids. This is the shared function, but Chinese medicine adds a step. The Bladder is described as needing qi to do the job, specifically qi from the Kidney, to turn the fluid it receives into something it can release. That step is called qi transformation, and it is why a Bladder pattern is almost always read alongside the Kidney rather than on its own.
It runs the body's outermost defensive layer. With the Small Intestine the Bladder forms the Taiyang, described in the Shang Han Lun as the most exterior of the six levels. When the classical texts talk about a pathogen first arriving at the surface of the body, the Taiyang is where it arrives. That is why the upper Bladder channel, across the neck and shoulders, is used so much for things that arrive suddenly from outside.
It carries the back shu points. The inner line of the Bladder channel runs down either side of the spine and holds one point for each of the twelve organs. These are the points a practitioner uses to reach an organ through the back, and they are the single biggest reason this channel is used as often as it is.
The Bladder meridian
The Bladder channel begins at BL1, at the inner corner of the eye. It runs up over the forehead and across the top of the head, then descends the back of the skull and splits into two parallel lines down the back, an inner line close to the spine and an outer line beside it.
Both lines run the length of the back and through the buttock, then rejoin behind the knee at BL40. From there the channel continues down the calf, passes behind the outer ankle bone, runs along the outside of the foot and ends at BL67, at the outer corner of the little toenail.
Sixty-seven points, more than any other channel. It is the only one that runs the entire length of the body from head to foot on the back surface.
Where it falls in the organ clock
| Hours | Organ |
|---|---|
| 1 to 3 p.m. | Small Intestine |
| 3 to 5 p.m. | Bladder |
| 5 to 7 p.m. | Kidney |
The Bladder and Kidney take the late afternoon and early evening, the Water hours.
The back shu points
The inner line of the Bladder channel carries one point for each organ, in the same top-to-bottom order as the organ clock circuit.
| Point | Organ |
|---|---|
| BL13 | Lung |
| BL14 | Pericardium |
| BL15 | Heart |
| BL18 | Liver |
| BL19 | Gallbladder |
| BL20 | Spleen |
| BL21 | Stomach |
| BL22 | San Jiao |
| BL23 | Kidney |
| BL25 | Large Intestine |
| BL27 | Small Intestine |
| BL28 | Bladder |
Each of these is the traditional route to its organ through the back. It is also a good illustration of how the system holds together. Every organ on this site has a point on this one channel.
Common Bladder patterns
These are traditional pattern descriptions, not diagnoses. Working out a pattern is a practitioner's job.
| Pattern | Traditional signs |
|---|---|
| Damp heat in the Bladder | Scanty dark urine, discomfort on passing it, a sensation of heat below, a yellow greasy tongue coating |
| Bladder cold and deficiency | Frequent pale urine, worse in cold weather, a pale tongue, a feeling of cold at the low back |
| Taiyang exterior pattern | Stiffness and ache across the neck and upper back, aversion to cold and wind, a floating pulse |
| Bladder qi not transforming | A sensation of fullness below with little passing, worse when tired |
Herbs and formulas traditionally associated with the Bladder
Chinese herbal medicine describes each herb as entering certain channels. The ones below are traditionally described as entering the Bladder channel, grouped by their traditional action.
These are not recommendations for the patterns above. The sections are separate on purpose.
Traditionally used to move damp and heat downward
| Product | Traditional description |
|---|---|
| Dianthus Formula (Ba Zheng San Tang) | An eight-herb classical formula. Dianthus is the lead herb. Traditionally used where the texts describe damp heat collecting in the lower body. |
Traditionally used to warm and hold
| Product | Traditional description |
|---|---|
| Ye Niao Ting Night Urination Formula | Named for the time of day it is traditionally associated with. Enters Kidney and Bladder, the Water pair. |
Traditionally associated with the Water pair
| Product | Traditional description |
|---|---|
| Liu Wei Di Huang Wan | Six ingredients built on prepared rehmannia. The base formula of the Water organs, traditionally described as supplying the yin side of the pair. |
Questions people ask
Where does the Bladder meridian run? It starts at the inner corner of the eye, goes up over the head, down the back of the skull, splits into two lines running either side of the spine, down through the buttock and back of the thigh, rejoins behind the knee, down the calf, behind the outer ankle, and ends at the outer corner of the little toenail. Sixty-seven points, the most of any channel.
What are the back shu points? They are the twelve points on the inner Bladder line beside the spine, one for each organ. They are the traditional way of reaching an organ through the back.
Which organ is paired with the Bladder? The Kidney. They are the yang and yin organs of the Water element and share the same associations, which are winter, black, cold, the salty flavor, and the ears.
Why is the Bladder channel used for the neck and shoulders? Because it forms the Taiyang, the outermost of the six levels, and the upper part of the channel crosses exactly that area. The classical texts describe stiffness across the neck and upper back as the first sign of something arriving at the surface.
Why is fear the Bladder emotion? It takes the emotion of its element and its paired organ. Water holds fear, along with the endurance the texts describe as its balanced form.