Introduction to Qi

In traditional Chinese medicine, the mind and body are viewed as one. They are made up of key substances including qi (pronounced chee), blood, essence, and bodily fluids, with each element contributing to the function of internal organs.

From physical matter to invisible energies, these core elements of mind and body govern all dimensions of human existence—whether physical, emotional, mental, or spiritual.

Their deep connection with human activity makes them integral to understanding physiology, and awareness of them is vital for accurate diagnosis.

Recognizing and comprehending these substances is a crucial aspect of diagnosing health conditions.

Understanding "Qi"

Understanding "Qi"

Although qi is central to traditional Chinese medicine, it remains a challenging concept to define. It's more effectively grasped through its functions and activities, which are easier to experience and observe.

Located at the intersection of matter and energy, qi embodies aspects of both. It has presence without form and energy without the ability to be measured. It is the core force behind all natural phenomena, as well as the essential life force within the human body.

For instance, the power of a thunderstorm can be understood through qi: The effects of qi are evident in the destruction of trees and buildings left in the wake of the storm.

The health of the digestive organs can be assessed by evaluating their qi, which is reflected in factors like appetite, tongue color, pulse strength, and the body's overall response to food and nourishment.

The Meridians

The body's qi flows through a system of channels known as meridians. There are 12 primary meridians, each corresponding to one of the 12 organ systems: six yin organs and six yang organs. These organs are paired based on their structure, function, and the interconnection of their meridians.

Additionally, eight extra meridians connect all the channels in the body. This expansive network ensures that qi, or vital energy, circulates throughout the tissues and organs, providing essential nourishment, warmth, and vitality.

The qi travels from one meridian to the next, completing a full cycle through the body every 24 hours. For example, the qi in the heart meridian peaks between 11 a.m. and 1 p.m., then moves to the small intestine meridian until 3 p.m., before flowing into the bladder meridian.

In this manner, qi circulates through all the major meridians and their associated organs on a daily basis. Even though the meridians are located deep within the body, certain points along them are accessible from the skin's surface.

The therapeutic techniques of acupressure, moxibustion, and acupuncture are based on the manipulation of these points using pressure, heat, or needles, respectively.

The qi flowing through the meridians can be adjusted at specific acupuncture points, directing healing energy to organs in need and releasing blocked energy from areas where stagnation has occurred.

Qi works synergistically with other vital substances to maintain health and balance in the body. Continue reading to explore the functions of qi in more detail.

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Roles of Qi

Although numerous specialized types of qi exist within the body, each linked to a specific organ, they all share certain core functions. These include:

The origin and function of qi shape the type of qi present in the body. Discover more about the different types of qi in the next section of this article.

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Categories of Qi

In traditional Chinese medicine, qi is categorized based on its origin and function. The life force inherited from one's parents is called prenatal qi.

Prenatal Qi

Prenatal Qi

Prenatal qi is the foundational essence of an individual, determined by both genetics and the quality of the parents' lives during conception and pregnancy.

This qi represents a person's inherited life force, which cannot be replenished. However, adopting a healthy lifestyle, proper diet, and breathing exercises can help preserve prenatal qi and slow its natural depletion.

Maintaining prenatal qi is a key principle in traditional Chinese medicine. It supports individuals who are frail or unwell, enabling them to lead healthier, more vibrant lives. This is achieved by conserving prenatal qi while simultaneously promoting the generation of postnatal qi.

Postnatal Qi

Postnatal Qi

Postnatal qi, also known as acquired qi, is generated from the digestion of food and the air we breathe. When combined with prenatal qi, it forms the total power of the body to carry out all essential life functions.

Lung Qi: One of the lung's key roles is to extract qi from the air and add it to the store of postnatal qi. The strength of postnatal qi is influenced by factors such as lung qi strength, air quality, and the practice of breathing exercises like qi gong, which enhances the lung's ability to absorb qi. A deficiency in lung qi can lead to symptoms like fatigue, shortness of breath, pale complexion, and frequent colds.

Spleen Qi: The quality of the food we consume and the strength of our digestive system, particularly the spleen, also play a crucial role in building robust postnatal qi. Weak spleen qi can cause fatigue, poor appetite, sluggishness, and loose stools. Even with strong spleen qi, a poor or imbalanced diet can impair the body's ability to extract qi effectively.

People who are used to consuming fresh organic fruits, vegetables, and whole grains often notice a drop in energy when they are forced to eat processed, refined, and pesticide-laden foods. Research has shown that produce grown organically contains significantly higher levels of nutrients.

When both spleen qi and lung qi are strong, and the quality of the air and food is optimal, postnatal qi can thrive. Herbs that strengthen lung and spleen qi, along with practices like qi gong, further boost the accumulation of postnatal qi. This allows even someone with a weaker prenatal qi to experience vitality and health.

True Qi

True Qi

True qi is the total energy formed by the combination of prenatal and postnatal qi. It governs all bodily functions and exists in various forms. From a clinical standpoint, two key types of qi are especially important: nutritive qi and protective qi.

Nutritive Qi: Nutritive qi flows through the meridians, providing nourishment to the organs. Acupuncture influences this qi to regulate organ functions. By targeting specific points along the meridians, these areas can be needled, pressed, or heated with moxibustion to produce desired effects on the organs.

For example, a point located just below the knee is traditionally used to treat appendicitis, often relieving symptoms when caught before infection sets in.

A Chinese surgeon who performed appendectomies noticed that needling this specific point on patients led to rhythmic contractions in the intestines near the appendix. This illustrates the observable power of qi, even if its exact mechanism remains mysterious.

Protective Qi: Another essential aspect of true qi is protective qi, or wei qi. Flowing between the skin and muscles, wei qi plays a vital role in defending the body against external pathogens.

Although first described millennia ago, wei qi aligns with the concept of the body's immune system. Studies have shown that herbs traditionally used to strengthen wei qi, like Astragalus root (huang qi), significantly enhance the body's resistance to illness and bolster immune function.

Acupuncture points such as Stomach 36 (Zusanli) and Large Intestine 4 (Hegu) are known to have similar beneficial effects on enhancing immune function.

Alterations in the levels, direction, or flow of qi within the body can lead to various health issues. Explore the topic of qi disorders in the following section of this article.

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Disorders of Qi

Chinese medicine aims to maintain proper levels, direction, and flow of qi to support the health of each organ. Disorders of qi may involve deficiency, sinking, stagnation, or improper movement of qi.

Qi Deficiency

Common symptoms of qi deficiency are fatigue, pallor, and low energy. When the qi of a specific organ is deficient, the normal function of that organ is impaired as well.

For instance, the spleen governs appetite and digestion; when spleen qi is deficient, symptoms like poor appetite and loose stools arise. Lung qi is responsible for respiratory strength; a deficiency leads to shortness of breath and chronic coughing. Treatment typically involves tonifying, or strengthening, the qi of the affected organ.

Sinking Qi

In cases of sinking qi, the qi that normally supports organs is too weak to do so, resulting in sagging or prolapsed organs like the uterus, transverse colon, or rectum. Acupuncture and herbal treatments can help restore balance and strength to address this issue.

Stagnant Qi

Stagnant Qi

When qi becomes stagnant, it disrupts the normal functioning of an organ due to a blockage in its flow. The liver is most commonly affected by qi stagnation, as it governs the smooth flow of emotions. Stagnant liver qi often leads to irritability and anger. Since there is already an abundance of qi, tonifying in these cases would worsen the condition. Instead, treatment focuses on facilitating the movement of qi away from the affected area.

Rebellious Qi

Rebellious Qi

In cases of rebellious qi, the usual flow of energy in the organs is disrupted, causing it to move in the opposite direction. Each organ typically has a designated flow for qi; for instance, the lungs and stomach generally direct qi downward, while the spleen directs it upward. Rebellious lung qi can cause symptoms like coughing or wheezing, while rebellious stomach qi may lead to nausea, belching, or vomiting, and rebellious spleen qi can result in diarrhea.

Qi is only one of the fundamental elements that traditional Chinese medicine addresses in its practice. To explore the other key substances considered during treatments, continue to the next section of this article.

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Other Vital Substances in Chinese Medicine

Qi is just one of the vital substances that traditional Chinese medicine views as crucial to health and vitality. Alongside qi, blood, body fluids, essence, and spirit all contribute significantly to our well-being.

Blood

In traditional Chinese medicine, blood serves functions similar to its Western understanding, such as circulating throughout the body and providing nourishment to the organs.

In traditional Chinese medicine, blood also plays subtle yet crucial roles, such as providing a solid foundation for the mind and enhancing the sensitivity of the sensory organs.

A deficiency in blood can result in impaired mental functions, leading to issues like poor memory, anxiety, and insomnia.

Blood deficiency can also affect the senses, particularly the eyes, causing blurred vision. Blood and qi are deeply connected, with a saying that goes, "Blood is the mother of qi, and qi is the leader of blood." This reflects the idea that without blood, qi has no solid nourishment, and without qi, blood cannot form or circulate properly, resulting in blood failing to stay within the vessels. Both substances are said to flow together throughout the body.

Disorders of Blood

The primary role of blood is to circulate throughout the body, nourishing and moisturizing the organs, skin, muscles, and tendons. When blood is deficient, signs such as dry skin, brittle hair, stiff tendons, and various emotional or reproductive disturbances may appear, depending on the organs affected.

Since qi and blood are deeply intertwined, a deficiency or stagnation in one often leads to a corresponding imbalance in the other.

The organs most closely connected to blood are the spleen, heart, and liver. The spleen is responsible for generating qi and blood from food, and it also helps to keep blood within the vessels. A deficiency in spleen qi can lead to blood deficiency or bleeding issues.

The heart is said to "govern the blood and vessels." When the heart lacks qi or yang, it cannot provide enough energy to circulate blood through the vessels, causing poor circulation and coldness in the limbs.

As the heart blood also serves as the home for the mind and spirit, a deficiency in heart blood can result in symptoms such as insomnia, palpitations, restlessness, and poor memory.

The liver, on the other hand, stores blood during rest or sleep, facilitating regeneration. It is also closely involved with menstrual health and fertility. A deficiency in liver blood may lead to scanty menstruation or infertility.

When liver blood stagnates, it can lead to menstrual cramps and discomfort. Since the liver is connected to the eyes, this imbalance can also cause symptoms like blurry vision, floaters, and dry eyes.

Body Fluids

Body fluids include all the fluids in the body, such as sweat, tears, saliva, and various other secretions and lubricants. The spleen and stomach are responsible for the formation of these fluids, which are considered byproducts of digestion, while the intestines and bladder handle their excretion.

The lungs regulate body fluids from above, while the kidneys control their metabolism throughout the body.

Fluids in the body fall into two main categories: clear, thin fluids known as jin, and thicker, more viscous fluids called ye. Jin is primarily distributed to the muscles and skin, where it helps to keep them nourished and moist.

Ye serves as a lubricant for the joints and provides nourishment to the brain. Jin ye refers collectively to all the body's fluids.

Due to the connection between the organs and body fluids, a traditional Chinese medicine practitioner can infer a wealth of information about the functioning of the organs based on the condition of jin ye.

For this reason, the initial consultation involves questions about thirst, urination, fluid color, and the frequency and timing of sweating.

Sweat is governed by the heart. Excessive daytime sweating is seen as an indicator of yang deficiency, while night sweats are typically a sign of yin deficiency.

Tears are related to the liver; dry eyes often point to liver blood and yin deficiency. Sputum is regulated by the spleen; an excess of sputum is a sign of yin excess in the spleen.

The lungs serve as the reservoir for mucus; symptoms such as a runny nose or a wet cough indicate an excess of yin in the lungs. Since the kidneys regulate the moisture in the entire body, a dry mouth may suggest kidney yin deficiency.

Body fluids are closely connected to qi. As qi plays a role in the transformation of fluids, a deficiency in qi can lead to fluid retention or excessive sweating.

On the other hand, fluid stagnation can disrupt the flow of qi, and significant fluid loss may result in a severe qi deficiency. Therefore, herbs that induce sweating should be used with caution in individuals with qi deficiency.

Essence and Spirit (Jing and Shen)

Essence and Spirit (Jing and Shen)

Essence (jing) is stored in the kidneys and is the subtle substance responsible for growth, development, and reproduction.

Prenatal essence is inherited from the parents and serves as the fundamental substance of life. It cannot be increased, but it can be preserved through a healthy lifestyle and moderation. It can be supplemented with postnatal essence, which comes from nourishment.

When the essence is robust, a child grows and develops normally, enjoying strong brain function, immunity, and fertility in adulthood.

On the other hand, birth defects, mental retardation, and a child failing to thrive are seen as signs of essence deficiency. In adults, essence deficiency can lead to infertility, weakened immunity, and premature aging.

Spirit (shen) represents a person's intrinsic vitality. It can be viewed as the soul, but it also has a material component. When shen is healthy, the eyes radiate life, and the mind remains clear.

Since the heart serves as the dwelling place for the spirit, disturbances in shen are often linked to imbalances within the heart.

A mild shen syndrome presents with heart blood deficiency, showing signs such as forgetfulness, insomnia, fatigue, and restlessness.

In a more severe shen syndrome, where "heat phlegm confuses the heart," the individual may display violent behavior, along with a red face and eyes; this condition might be diagnosed as psychosis in Western medicine.

Someone in a coma due to a stroke or a person suffering from epileptic seizures may be diagnosed with a shen disturbance called "phlegm blocking the heart opening."

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ABOUT THE AUTHORS:

Bill Schoenbart has been immersed in the practice of traditional Chinese medicine (TCM) since 1991, the year he earned his Masters degree in TCM. In addition to teaching TCM medical theory and herbalism at a California acupuncture school, he continues to practice clinically.

Ellen Shefi is a licensed massage therapist, acupuncturist, and registered dietitian. She operates a private acupuncture practice, has been involved in developing acupuncture protocols, and has contributed to a national research project supported by the National Institutes of Health Office of Alternative Medicine. Ellen is a member of the American Association of Acupuncture and Oriental Medicine, the American Herb Association, and the Oregon Acupuncture Association.