Qi Dynamics in Medicine: The 5 Phases (五行) and 5 Zang "Organs" (五臟)

The four fundamental movement patterns in East Asian Medicine arise from observation of the four seasons. Each season is associated with a direction based on its position on the wheel of time (田), as discussed in the article Qi Dynamics in Nature: The Seasons (時). If you have not already read that article, as well as the preceding discussion of Heavenly and Earthly Qi, it may be helpful to do so first, as they provide the conceptual background for the ideas explored here.

In addition to directional associations, each season came to be linked with a phase (element) and a corresponding “organ.” The word organ is placed in quotation marks because the translation of zàng (藏) as “organ” can be misleading, at least when discussing early Chinese thought.

In modern Chinese usage, the zàng characters are used to refer to the same-named anatomical organs of the body—Liver (肝), Lung (肺), Spleen (脾), Kidney (腎), and Heart (心). In early Chinese cosmological thinking, however, these names did not primarily refer to anatomical structures. Rather, they functioned as categories used to describe how seasonal movement patterns manifest within the human body.

The same patterns observed in nature were therefore given different names depending on the medium through which they were expressed. In the natural world, these patterns were described through the five phases (五行 wǔxíng)—wood (木), fire (火), earth (土), metal (金), and water (水). Within the human body, the same dynamics were categorized through the five zàng (五臟).

One small clue to this distinction can be seen in the structure of the characters themselves. Many of the characters used for the zàng contain the flesh/moon radical 月, indicating that the pattern being described is expressed within the physical body.

For readers who may be wondering about the fǔ (腑) organs: these are not included in the present discussion because they do not appear in the earliest cosmological framework in quite the same way. In my own view, the fǔ likely became more systematized as Chinese medicine gradually incorporated increasingly detailed anatomical and physiological observations—something that was already underway by the time the Nèijīng was compiled.

Heaven–Human–Earth Framework

To further clarify how these same energetic movement patterns were named differently depending on where they appear, we can organize them using the classical tripartite framework of Heaven–Human–Earth (天地人 tiān-dì-rén).

1. Heaven (天)

The seasons represent energetic patterns unfolding at the level of Heaven, reflecting the larger cosmological forces that shape the natural world.

2. Humanity (人)

The zàng describe how these same patterns appear within the human being. Because humans occupy an intermediate position between Heaven and Earth, the zàng describe how the larger patterns of nature (yang) are expressed within the body (yin).

3. Earth (地)

The five phases describe how these same patterns appear in the material world, including plants, landscapes, and the transformations of matter over time.

Although these categories are described separately, they ultimately refer to the same underlying patterns of movement expressed through different phenomena. These recurring patterns form the basis of the correlative correspondences used throughout East Asian Medicine.

Seasonal Correspondences, Movement Patterns, and the 5 Phases (五行)

Spring : East : Wood : Liver

Qi pattern: Rising

Qualities from Suwen 2: Emergence and Display(發陳)

In spring, qi begins to stir after the nadir of winter’s dormancy. Two primary energetic movements mark the initiation of spring: the outward expansion of Heavenly qi and the rising of Earthly qi.

As Sandra Hill writes:

“Early descriptions of yin and yang express the two great movements of life generated by the interaction and interpenetration of heaven and earth, as seen in the constant warming and cooling, ascending and descending of vapors as heat expands and cold contracts” (Hill, 2014).

The pairing of rising and expanding corresponds to the emergence of yang qi, since both movements mirror the energetic qualities of warmth and growth. For this reason, the warmer half of the year—from the spring equinox through the autumn equinox—represents the period of greatest expression of yang qi.

During the early portion of this cycle, the rising movement of Earthly qi is especially pronounced. As the year progresses toward summer, the expanding movement of Heavenly qi becomes increasingly dominant.

Within the human body, the qi of spring therefore tends to increase movement activity, traditionally described as Liver qi. There is also a greater tendency for qi to move upward toward the head, sometimes described clinically as Liver yang rising.

In individuals whose qi already tends to rise easily, this seasonal influence may exacerbate symptoms such as headaches, dizziness, or feelings of being ungrounded. Conversely, individuals whose qi tends to be constrained or sluggish may experience some relief during the spring, as the rising movement of the season encourages circulation and flow.

Summer : South : Fire : Heart

Qi pattern: Expanding

Qualities from Suwen 2: Flourishing and Blossoming (華實)

Summer represents the apex of the rising and expanding movements generated by the interaction of Heaven and Earth. At this time, the expansive movement of Heavenly qi becomes dominant.

At the height of summer, qi is therefore both fully ascended and fully expanded, contributing to the luxuriant growth of plants and the appearance of flowers, fruits, and grains.

This outward expansion can also be seen in the imagery contained within certain Chinese characters. The characters for grain 禾 (hé), rice 米 (mǐ), and fruit 果 (guǒ) all depict plants whose growth has expanded outward from a central axis.

In humans, this same seasonal movement encourages qi and blood to move upward and outward toward the surface of the body. As circulation increases near the skin, conditions associated with heat may become more pronounced, while conditions associated with cold may temporarily improve.

Because blood is drawn toward the exterior, symptoms during summer are also more likely to appear at the surface of the body or within the smaller blood vessels, such as capillaries and arterioles. This can manifest as redness, flushing, or an increased tendency toward bleeding, including nosebleeds or heavier menstrual bleeding.

Autumn : West : Metal : Lung

Qi pattern: Contracting

Qualities from Suwen 2: Harvest, Pulling In and Waning (殺急明)

At the beginning of autumn, the contraction of Heavenly qi combines with the descent of Earthly qi. This shift causes the remaining fruits, seeds, and flowers of summer to drop from plants and trees as the energy of the season begins moving downward and inward toward the roots.

In the human body, this same seasonal movement draws qi, fluids, and blood from the exterior back toward the interior. As circulation withdraws from the surface, dryness may begin to appear in the skin and mucous membranes—particularly in the upper body—which is why autumn is traditionally associated with dryness. At the same time, seasonal qi promotes the descent of water and the outward movement of fluids, further contributing to dryness.

Winter : North : Water : Kidney

Qi pattern: Descending

Qualities from Suwen 2: Closing and Storage (閉藏)

In winter, the absence of strong yang activity causes qi to retract and contract inward. This inward movement reflects the energetic quality of cold.

In the natural world, Earthly qi has fully descended into the soil. Water freezes into ice, perennial plants withdraw their vitality into their roots, and above-ground foliage dies back and returns to the earth. Animals retreat into burrows and caves, and many enter states of hibernation.

In humans, the energy of the body similarly moves away from the surface toward the interior and toward the lower regions of the body.

Statements in the Nèijīng such as “qi is located at Kidney” should therefore be understood primarily in terms of energetic depth and location, rather than strictly anatomical reference. In this context, Kidney qi refers to qi residing closer to the body’s core or lower regions, reflecting the inward and descending movement pattern of winter.

Between Seasons : Pivot : Earth : Spleen

Qi pattern: Transformation

Earth occupies a unique position within the cycle of the year and can be understood in two related ways.

First, Earth resides at the center, representing a still point of generative potential from which movement can emerge and to which it can return.

Second, Earth represents pivoting or transformation between phases of movement. These pivot points occur midway between the solstices and equinoxes at the seasonal nodes marking the beginnings of the seasons in East Asian calendars.

These transitional moments represent points of enantiodromia, where one dominant movement pattern transforms into another.

Both the role of Earth at the center and its association with pivoting or transformation relate to the imagery of soil (土). The surface of the soil represents the dividing line between yin and yang, while the growth of plants through that boundary illustrates transformation itself. Plants emerge upward from the hidden depths of the soil into the visible world, moving from yin toward yang, and eventually return again to the earth as they decay. In this way, the life cycle of plants provides a natural image of the pivoting movement through which yin transforms into yang and yang returns again to yin.

Different expressions, same patterns

To review, the four seasons, five phases, and the five zàng “organs” represent different expressions of the same fundamental movement patterns—rising, expanding, descending, and contracting—that arise through the interaction of Heavenly and Earthly qi. The fifth phase/zàng represents the pivot points where one pattern transforms into another.

Rising and expansion dominate during the yang half of the year, encompassing spring and summer. In spring, the rising movement of Earthly qi is most pronounced, whereas in summer the expansive movement of Heavenly qi becomes dominant.

For this reason, the primary energetic direction associated with spring–east–wood–Liver is rising, while that associated with summer–south–fire–Heart is expanding.

During the yin half of the year, the dominant movements shift toward descent and contraction. In autumn–west–metal–Lung, the descending movement becomes most apparent, while in winter–north–water–Kidney, contraction and inward gathering dominate.

These seasonal dynamics illustrate the foundation of the correlative correspondences that structure East Asian medical thought. The same patterns of movement observed in the heavens, the landscape, and the life cycles of plants also appear within the human body. Rising, expansion, descent, and contraction are not merely abstract concepts but observable patterns of transformation that unfold across many scales of the natural world. By recognizing these recurring patterns, early physicians were able to understand the human body as part of the same larger processes that govern the seasons and the movements of the cosmos. In this way, the body becomes a living expression of the same seasonal rhythms that shape the natural world.

Next Article: Qi Dynamics in Medicine: Herbal and Food Energetics (Qi and Flavor 氣味)

References

Hill, S. (2014). Chinese medicine from the classics: A beginner’s guide.