One could say that Chinese medicine was born out of the theory of Yin and Yang. As well as describing that which exists in nature, Yin and Yang perfectly describes all the parts and functions of the body. Yin and Yang are in a constant state of dynamic balance, when this balance is threatened disease is possible. An example in nature of this dynamic balance is the rhythm of the sun (yang) and moon (yin). In a 24-hour period each is unique, change over to the other and require each other for overall balance (from the perspective of earth that is). Yin and Yang each have an individual expression in the body and yet requires the other to exist, for example Yin represents stillness, form and blood whereas, Yang represents activity, function and Qi. Qi needs blood to nourish it and blood needs Qi to move it.
Qi can be described as energy, material force, electromagnetic current, matter, ether, vital force, or life force. Qi travels throughout our entire body in channels or meridians reaching every aspect of our body. These channels are understood to be separate from the pathways of the nervous, vascular and lymph systems in Western medicine. Loosely, when we are born we begin with a gas tank of Qi and when the tank of Qi is empty our life force is gone or in other words, we die. This tank of gas is rooted in the organ system of the Kidneys according to Chinese medicine theory and is distributed throughout our organs, glands and channels in a very systematic way. Because of this intricate channel system within our body when we refer to an organ such as the Kidneys, that includes much more than the organ alone according to anatomy. Each organ system has representations of Yin and Yang, hormone balance as well as specific Qi and blood functions which plays a vital role in connecting, via the channels, with other organ systems and the entire body to render the body a holistic system. In other words, it isn’t possible, within TCM, to deem an organ or body part as an isolated problem without considering the whole body system. So, you say, what might this have to do with low back pain?
The Relation of the Kidney System in TCM and Low Back Pain
The low back is the “mansion of the Kidneys” meaning that the low back is most closely related, but not limited to, the health of the Kidney system. It is without question, in low back pain, that the Kidney system be treated in Chinese medicine.
Back on the subject of Qi, it is said in Chinese Medicine:
If there is free flow, there is no pain;
If there is no free flow, there is pain.
Basically, what this means is if the Qi and/or blood stagnate in the channel(s), specifically through the region of the low back, there will be pain. Imagine a river flowing unimpeded and suddenly a tree falls across the river, we see in our imagination the water no longer flowing freely, but getting blocked by the log, pushing into the banks of the river. The basic concept of acupuncture is to re-open the river, create a circulation so that the log lifts and normal flow is restored.
How does the free flow of Qi and blood in the body become impeded, so as to cause pain?
1. An external invasion of wind, cold, dampness, or heat may invade the lower back region causing pain. If our defensive Qi or immune system is weak we become more susceptible to external invasions through the pores of our skin.
2. The Qi and blood can stagnate due to trauma (i.e. lifting, repetitive strain over time, an accident or similar sprain).
3. There may be an insufficiency of Qi or blood creating a sluggishness or stagnation of flow throughout the channel(s). This is an internal cause or weakness with a number of possible etiologies such as:
Poor diet, insufficient rest coupled with too much activity or overwork (i.e. busy lives, excessive sex*), overuse of drugs, chronic illness, heredity weakness, an excess of the emotions fear and anxiety, and general aging as our Qi is naturally declining.
The Chinese believe that a healthy, moderate amount of sex supports a good flow of Qi and too much sex (specifically ejaculation for men and childbirth for women), depletes the Qi, blood and essence of the Kidneys.