The Extraordinary Vessels in Chinese Medicine
The Extraordinary Vessels (奇经八脉, qí jīng bā mài) are a group of eight channels that occupy a distinctive position within the theory of Traditional Chinese Medicine.
They are sometimes described as the body’s “reservoirs” or “regulating vessels”. Unlike the twelve primary meridians, they are not directly associated with one of the Zang-Fu organs and do not have their own regular cycle of Qi.
Instead, they have an important role in regulating, storing and distributing Qi and Blood throughout the body.
The Extraordinary Vessels are particularly important in the treatment of constitutional problems, long-standing conditions, reproductive health, and disorders that do not fit neatly into the patterns of the ordinary meridians.It is, for example, by virtue of its effect on the Extraordinary Vessels that Taichi and Qigong have such profound and long lasting effects, as they have the ability to alter one’s basic physical and mental constitution.
The Eight Extraordinary Vessels
The eight vessels are:
- Du Mai (Governing Vessel) – 督脉
- Ren Mai (Conception Vessel) – 任脉
- Chong Mai (Penetrating Vessel) – 冲脉
- Dai Mai (Girdling Vessel) – 带脉
- Yin Qiao Mai (Yin Heel Vessel) – 阴跷脉
- Yang Qiao Mai (Yang Heel Vessel) – 阳跷脉
- Yin Wei Mai (Yin Linking Vessel) – 阴维脉
- Yang Wei Mai (Yang Linking Vessel) – 阳维脉
Although they are often presented as a single group, the eight vessels have quite different functions and clinical applications.
How Are the Extraordinary Vessels Different from the Primary Meridians?
The twelve primary meridians are closely associated with the Zang-Fu organs and are understood to transport Qi and Blood through regular pathways.
The Extraordinary Vessels are different.
They are not simply another set of meridians running alongside the primary channels. Instead, they have a regulating and integrating function.
One useful traditional image is that of reservoirs. When there is an excess of Qi or Blood in the primary channels, the Extraordinary Vessels can act as a kind of reservoir; when the body’s regular channels are deficient, they can also contribute to supplying them.
They therefore occupy an important position between the body’s constitutional resources and the day-to-day circulation of Qi and Blood.
Du Mai – The Governing Vessel
The Du Mai is often translated as the Governing Vessel.
It runs along the midline of the back and is closely associated with the Yang aspect of the body. It is particularly important in relation to the spine, nervous system, brain and the body’s Yang Qi.
Du Mai patterns may be considered when there are problems involving:
- The spine and back
- Stiffness and weakness
- Headaches
- Neurological symptoms
- Lack of vitality
- Certain reproductive problems
Du Mai is also traditionally associated with the concept of Yang Qi, making it particularly significant when a person’s constitutional Yang appears weak.
Ren Mai – The Conception Vessel
The Ren Mai, or Conception Vessel, runs along the midline of the front of the body.
It is strongly associated with Yin, reproduction, menstruation and the reproductive system.
It is particularly important in Chinese medicine for conditions involving:
- Menstruation
- Fertility
- Pregnancy
- Menopausal symptoms
- The uterus and reproductive organs
- The lower abdomen
Ren Mai and Du Mai are often considered together because they form an important Yin-Yang pairing running along the front and back midlines of the body. The Microcosmic Orbit meditation 🧘♀️ technique specifically pertains to deliberately circulating Qi through these two channels – up the Du Mai on the back, and down the Ren Mai on the front.
Chong Mai – The Penetrating Vessel
The Chong Mai is sometimes called the Penetrating Vessel or Thoroughfare Vessel. Chong 沖 means rushing water in Chinese, and this gives an idea of the power of the Qi within this central vessel.
It has a particularly deep and wide-ranging set of functions and is traditionally associated with Blood, menstruation and reproduction.
It is sometimes referred to as the “Sea of Blood”, reflecting its close relationship with the Blood and the uterus.
Chong Mai may therefore be considered in conditions involving:
- Menstrual irregularities
- Painful periods
- Heavy periods
- Fertility
- Pregnancy
- Abdominal symptoms
- Digestive problems
- Emotional symptoms associated with the menstrual cycle
It also has important connections with the Stomach and chest, which helps explain its broad clinical significance.
Dai Mai – The Girdling Vessel
The Dai Mai, or Girdling Vessel, is unusual among the Extraordinary Vessels because it travels horizontally around the waist rather than vertically through the body.
It effectively “girdles” the other channels.
Dai Mai is particularly associated with the lower abdomen, hips, pelvis and reproductive system.
It may be considered in conditions involving:
- Abdominal and pelvic problems
- Menstrual disorders
- Vaginal discharge
- Lower back and hip problems
- A feeling of heaviness around the waist
The image of a belt around the waist is useful when understanding the traditional function of this vessel: it is associated with containing and regulating what lies below the waist.
Yin Qiao Mai and Yang Qiao Mai
The two Qiao vessels are often translated as the Yin Heel Vessel and Yang Heel Vessel.
The word Qiao is associated with the idea of agility or movement, and these vessels have important relationships with the legs, movement, balance and the eyes.
They are also involved in regulating the body’s relationship between Yin and Yang.
The Yin Qiao Mai is more closely associated with Yin, while the Yang Qiao Mai is associated with Yang.
They may therefore be considered in conditions involving:
- Problems with walking or movement
- Muscular tension
- Leg problems
- Sleep disturbances
- Eye problems
- Imbalances between Yin and Yang
The Qiao vessels are particularly interesting because their influence extends beyond the legs themselves, reaching the eyes and aspects of sleep and wakefulness.
Yin Wei Mai and Yang Wei Mai
The two Wei vessels are the Yin Linking Vessel and Yang Linking Vessel.
The word Wei can be understood in terms of connecting or linking. These vessels have an important role in linking the Yin or Yang channels together.
They are particularly relevant to the relationship between the body’s different channels and to the transition between different physiological and emotional states.
The Yin Wei Mai is more closely associated with the Yin channels and has important connections with the chest and Heart. The paired points NeiGuan內關 and GongSun specifically pertain to the Yin Wei Channel, and this explains their strong psychological effect.
The Yang Wei Mai connects the Yang channels and has a close relationship with the body’s exterior and with disorders involving the sides of the body, shoulders and head.
They can therefore be considered in a wide range of chronic or complex presentations, particularly where several channels appear to be involved.
The Extraordinary Vessels and Constitutional Patterns
One of the most interesting aspects of the Extraordinary Vessels is their relationship with Jing (Essence) and the body’s constitutional resources.
This helps explain why they are often considered in conditions that are longstanding, recurrent or connected with major stages of life.
They can be particularly relevant to:
- Fertility
- Menstruation
- Pregnancy
- Menopause
- Development
- Ageing
- Chronic illness
- Constitutional weakness
This does not mean that every chronic condition should automatically be treated through an Extraordinary Vessel. Rather, the vessels provide another layer through which a Chinese medicine practitioner can understand a person’s presentation.
How Are the Extraordinary Vessels Used in Acupuncture?
The Extraordinary Vessels are traditionally accessed through particular confluent or opening points on the primary meridians.
Each Extraordinary Vessel has an associated opening point, and these points are often paired with another point to access the vessel.
For example:
- Du Mai: SI3 – Houxi
- Ren Mai: LU7 – Lieque
- Chong Mai: SP4 – Gongsun
- Dai Mai: GB41 – Zulinqi
- Yin Qiao Mai: KI6 – Zhaohai
- Yang Qiao Mai: BL62 – Shenmai
- Yin Wei Mai: PC6 – Neiguan
- Yang Wei Mai: SJ5 – Waiguan
These pairings are a distinctive feature of Extraordinary Vessel acupuncture.
The choice of vessel is not simply based on where a patient has pain. A practitioner considers the person’s overall pattern, symptoms, constitution and the relationships between the different channels.
Why Are the Extraordinary Vessels Important?
The Extraordinary Vessels give Chinese medicine another way of understanding the body.
The primary meridians provide a framework for understanding the circulation of Qi and Blood and their relationship with the organs. The Extraordinary Vessels provide a broader framework for understanding constitutional resources, regulation, reproduction, development and relationships between the different channels.
This can be particularly valuable when treating complex or longstanding conditions where a purely organ-based or local approach does not seem to explain the whole picture.
In Summary
The Eight Extraordinary Vessels occupy a unique place within Chinese medicine.
They include the Du Mai, Ren Mai, Chong Mai, Dai Mai, Yin Qiao Mai, Yang Qiao Mai, Yin Wei Mai and Yang Wei Mai. Rather than functioning simply as another set of ordinary meridians, they help regulate and integrate the body’s network of channels and are closely connected with constitutional resources and, in particular, the body’s Jing.
For an acupuncturist, they provide an additional level of diagnosis and treatment that can be especially useful in constitutional, reproductive, chronic and complex conditions.
Their traditional theory is extensive, and understanding the Extraordinary Vessels properly requires looking at the relationships between them, the primary channels, the Zang-Fu organs and the body’s constitutional Essence.
This is one of the aspects of Chinese medicine that makes acupuncture more than simply a system of treating individual symptoms: the treatment can be directed towards the relationships and patterns underlying those symptoms.
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