1. Introduction: Knee Osteoarthritis Is More Than Just "Aging"

Many middle-aged and older adults experience this: their knees no longer "obey" them – pain when walking, pain when going up and down stairs, and even more discomfort when standing up after prolonged sitting. Many attribute this to "getting older – my joints are just worn out." However, in Traditional Chinese Medicine (TCM), knee osteoarthritis is far more than a simple matter of aging. Behind it lie profound internal roots and external triggers – it is a comprehensive manifestation of imbalance between the body's internal and external environments.

1.1 TCM Understanding of Knee Osteoarthritis

In TCM, knee osteoarthritis falls under the categories of "knee bi" and "bone bi". The term "bi" refers to obstruction or blockage. When the meridians and the flow of qi and blood are impeded, symptoms such as pain, numbness, and limited movement arise. Knee osteoarthritis is a classic example of the fundamental TCM pathological concept: "pain arises from obstruction" .

2. Internal Root: Liver‑Kidney Deficiency as the "Foundation"

2.1 Theoretical Basis: "Liver Governs Tendons, Kidneys Govern Bones"

A core TCM tenet states: "The liver governs the tendons, and the kidneys govern the bones." Tendons – including tendons, ligaments, and other soft tissues – depend on liver blood for nourishment; bones themselves rely on kidney essence for strength and substance. The liver stores blood, and the kidneys store essence. When essence and blood are abundant, tendons and bones remain strong; when they are deficient, tendons and bones lose their nourishment.

2.2 Aging and Liver‑Kidney Decline

As age advances, liver and kidney functions naturally decline, and essence and blood gradually deplete. This is like an old tree – over time, its root system ages, its ability to absorb nutrients diminishes, and its branches and leaves naturally lose their former vigour. When tendons and bones no longer receive sufficient liver‑kidney essence and blood, they become fragile and unstable, leading to restricted joint movement, cartilage degeneration, and osteophyte formation.

2.3 Liver‑Kidney Deficiency as the Fundamental Cause

The Qing dynasty physician Zhang Lu, in his work Zhang's Comprehensive Medicine, clearly stated: "The knee is the house of the tendons; knee pain is invariably due to deficiency of the liver and kidneys." This statement highlights the core of knee problems – liver‑kidney deficiency is the fundamental cause of knee osteoarthritis. Deficiency of vital qi forms the basis upon which external pathogens can easily invade.

3. From Causes to Solutions: How Qiteng Therapy Addresses Both Internal and External Factors

Understanding the internal and external causes of knee osteoarthritis makes it clear why oral medication or simple physiotherapy alone often yields limited results. Tiandao TCM's Qiteng Therapy is a TCM external treatment designed precisely on the principle of "treating both the root and the manifestations."

3.1 What Is Qiteng Therapy? – Inheritance and Innovation in External Treatment

Qiteng Therapy belongs to the category of TCM external therapies. It combines the strengths of traditional herbal fumigation and hot compresses, using modern temperature‑control technology to continuously deliver the active ingredients of specially formulated herbs to the body surface in both steam and heat‑compress forms. Its core actions include: opening pores, unblocking meridians, expelling cold‑dampness, and promoting blood circulation to remove stasis – ultimately aiming to "activate self‑healing." The entire process bypasses the digestive tract and does not add metabolic burden to the liver and kidneys, making it particularly suitable for joint conditions that require long‑term management.

3.2 Addressing the "Root Deficiency" – Nourishing Liver and Kidneys Through Meridians

Although Qiteng Therapy is external, its formulas adhere to the principles of "tonifying the liver and kidneys, strengthening tendons and bones." The active herbal components penetrate the skin via high temperature and are conducted along the meridian system, indirectly influencing the liver and kidney meridians to help improve states of essence‑blood deficiency. This is not a direct "kidney tonic" but rather achieves "internal response through external treatment" via the body surface–meridian–organ pathway. With consistent application, it helps restore the nutritional supply to tendons and bones, slowing the degenerative process at its source.

3.3 Addressing the "Excess Manifestations" – Expelling Cold‑Dampness and Activating Blood Circulation

For external pathogens and blood stasis, Qiteng Therapy offers direct advantages. High‑temperature steam rapidly opens the interstices, allowing deep‑seated cold‑dampness to be expelled through sweat. Meanwhile, the combination of heat and active ingredients significantly improves local microcirculation, dissolves adhesions and nodules in muscle and fascia layers, and promotes the clearance of stasis and metabolic waste. Many users report a warm, light sensation in the knees after treatment, along with improved range of motion – signs that "qi and blood are flowing, and pathogenic factors are being dispersed."

3.4 Unifying Holistic and Local Approaches to Break the Vicious Cycle

Qiteng Therapy is not a "treat‑the‑head‑for‑headache" approach. By combining whole‑body fumigation with local reinforcement, it addresses both the local knee lesion and the overall state of qi and blood. It dispels pathogens without harming the vital energy, and strengthens the body without retaining pathogens – helping to break the vicious chain of "deficiency → pathogenic invasion → stasis." This holistic regulatory thinking is the essence of TCM treatment for chronic bone and joint disorders.

4. Conclusion: Understanding Knee Osteoarthritis from Its Roots

Knee osteoarthritis arises from the combined effect of internal liver‑kidney deficiency and external pathogenic invasion. Internal deficiency is the fundamental basis, while external wind‑cold‑dampness serves as the important trigger. They interact and mutually reinforce each other, culminating in a pathological state of "root deficiency with branch excess."

Understanding the etiology and pathogenesis of knee osteoarthritis not only helps us view this common condition more scientifically but also provides direction for prevention and management – emphasising both nourishing the liver and kidneys to consolidate the foundation, and expelling cold‑dampness and activating blood circulation to relieve symptoms. Addressing both internal and external factors, and treating both root and manifestations, is the correct approach to managing knee osteoarthritis.