I. Understanding Knee Osteoarthritis: A TCM Perspective on the "Root Deficiency with Excess Manifestations" of Knee Bi

1. Knee Osteoarthritis Falls Under the TCM Category of "Knee Bi"

As age advances, many individuals experience a cold sensation in the knees, a catching feeling when squatting and standing up, soreness when going up and down stairs, and joint stiffness on rainy or overcast days. Upon examination, these are often diagnosed as knee osteoarthritis – a common degenerative musculoskeletal condition among middle‑aged and older populations. In Traditional Chinese Medicine, such joint discomfort is classified as "knee bi" . Its core pathogenesis is root deficiency with excess manifestations – the internal weakening of the body's foundation is the fundamental cause, while external cold‑dampness and stasis serve as the precipitating environmental factors. These two layers interact and accumulate over time, giving rise to various persistent knee complaints.

2. Internal Cause: Gradual Liver‑Kidney Decline and Long‑Term Malnourishment of Tendons and Bones – The Fundamental Root

Classic TCM texts state that "the liver governs the tendons, and the kidneys govern the bones and produce marrow." The knee is referred to as the "house of the tendons." The stability and flexibility of joint movement, cartilage, and ligaments depend entirely on the continuous nourishment provided by liver‑kidney essence and qi.

• Natural aging depletes essence and qi: After middle age, visceral functions naturally decline, and liver‑kidney essence and qi gradually diminish. Tendons and bones no longer receive sufficient nourishment from qi and blood, leading to decreased ligament elasticity, inadequate bone nutrition, and significantly reduced joint tolerance – even minor strains can trigger discomfort.

• Insufficient postnatal visceral care: Chronic overwork, irregular rest patterns, and constitutional depletion continuously consume liver‑kidney vitality. When qi and blood production is insufficient, nourishment cannot be consistently delivered to both knees, forming the internal foundation of malnourished tendons and bones – a deep‑seated reason for recurrent knee discomfort.

3. External Cause: Invasion of Wind‑Cold‑Dampness and Qi‑Blood Stagnation Triggering Discomfort

On the basis of underlying liver‑kidney deficiency, external stimuli directly exacerbate knee bi symptoms – as the saying goes, "when vital energy is insufficient, external pathogens easily invade."

• Prolonged invasion of cold‑dampness pathogens: Living long‑term in cold and damp environments, failing to keep knees warm in autumn and winter, or years of exposure to cold water allow wind‑cold‑dampness to penetrate through the pores into the deep layers of the knee joint, congealing and obstructing local qi‑blood circulation.

• Strain aggravates meridian stasis: Long‑term heavy loading, frequent stair climbing, excessive exercise, or old injuries continuously damage the soft tissues around the knee, impeding qi‑blood circulation and causing meridian stagnation – manifesting as stiffness, soreness, and restricted movement.

In essence, internal liver‑kidney deficiency is the foundational issue, while external cold‑dampness and stasis are the surface manifestations. The combination of both gives rise to the various discomforts of knee osteoarthritis, and a single‑faceted maintenance approach is unlikely to provide long‑term relief.

II. Core Approach to Managing Knee Bi: Simultaneous Root and Manifestation Treatment – Nourishing Liver‑Kidneys and Unblocking Meridians in Parallel

1. Root‑Treating Strategy: Nourish the Liver and Kidneys, Strengthen the Foundation for Tendon and Bone Support

To reduce the recurrence of knee discomfort, it is not enough to merely relieve the immediate soreness – internal visceral care is essential. When liver‑kidney essence and qi are sufficient, qi and blood can be continuously delivered to tendons and bones, enhancing the joint's own tolerance and reducing the impact of cold‑dampness and strain. Daily maintenance should include measures to consolidate the foundation and improve visceral qi‑blood supply, thereby lowering the frequency of joint discomfort at its source.

2. Manifestation‑Treating Strategy: Warm and Disperse Cold‑Dampness, Unblock Qi and Blood to Relieve Immediate Discomfort

For surface symptoms such as cold knees, stiffness, swelling, and pain caused by cold‑dampness congelation and meridian stasis, the core principle is warming and unblocking – dispelling the cold pathogens accumulated deep within the joint, clearing the obstructed qi‑blood channels, improving local circulation, and relieving discomfort from soft‑tissue tightness and adhesions.

3. Addressing Both Root and Manifestations Is the Key to Long‑Term Maintenance

If only surface warming and unblocking are performed without addressing visceral deficiencies, cold‑dampness can easily invade again, leading to recurrent symptoms. Conversely, taking internal tonics alone cannot rapidly resolve local accumulations of cold‑turbidity in the joint, so immediate discomfort relief is limited. Therefore, for knee osteoarthritis, a regimen that combines internal and external approaches, simultaneously addressing both root and manifestations, is most appropriate – consolidating the foundation without neglecting stagnation, and resolving stasis without overlooking visceral nourishment – to achieve sustained joint health.

III. Qiteng Therapy: An External TCM Solution Tailored to the Root‑and‑Manifestation Needs of Knee Bi

1. The Underlying TCM Logic of Qiteng Therapy Aligns with the Principles of Knee Bi Management

Qiteng Therapy is developed from the traditional ancient method of hot steaming and fomentation. Through the dual actions of warm herbal vapour penetration and local hot compresses, it simultaneously achieves warming and unblocking to expel pathogens, and nourishing to support tendons and bones – perfectly matching the maintenance needs of knee bi by "nourishing the liver and kidneys, activating blood, and dispersing cold." It is a gentle external TCM modality.

• Warmth opens the collaterals and disperses surface cold‑dampness: Constant‑temperature herbal vapour acts on the knee joint. The warming force opens skin pores, dilates local blood vessels, accelerates qi‑blood flow, and gradually dispels cold‑dampness accumulated in joint spaces and soft tissues – improving symptoms such as cold knees, stiffness, and worsening on damp or rainy days.

• Heat penetration nourishes tendons and bones: The warm environment facilitates transdermal absorption of active herbal components, reaching the tendons, bones, and ligaments of the knee. While unblocking stagnant qi‑blood, it also assists in nourishing local musculoskeletal tissues, indirectly harmonising systemic qi‑blood and supporting the distribution of liver‑kidney essence to the lower limbs – thereby addressing root‑consolidation needs.

2. Advantages of Qiteng Therapy for Knee Osteoarthritis

• Gentle local action with lower burden: Unlike oral supplements alone, this external approach acts directly on the affected areas of both knees without requiring gastrointestinal metabolism – making it suitable for middle‑aged and older individuals with weaker digestive systems who may not tolerate long‑term oral therapies.

• Layered regulation addressing both root and manifestations: Steaming and hot compressing simultaneously accomplish cold dispersion, vessel unblocking, and nourishment of tendons and bones – one session addresses both surface cold‑dampness stasis and local malnourishment of tendons and bones, eliminating the need for multiple separate interventions.

• Suitable for various knee bi profiles: This can serve as a daily maintenance option for those experiencing knee pain when climbing stairs, catching during squatting and standing, swelling and coldness in the knees, or long‑term degenerative knee discomfort. Those with preserved joint spaces and no severe bony fusion are likely to experience better outcomes.

IV. Daily Supportive Care for Knee Osteoarthritis to Reinforce the Effects of Qiteng Therapy

1. Daily Warmth and Protection – Blocking External Cold‑Dampness Invasion

• Protect both knees throughout the year – wear knee pads in autumn and winter, avoid direct air‑conditioning or cold draughts on the knees, and do not sit on cold benches or floors for prolonged periods.

• Minimise exposure to water and rain; after sweating, dry the legs promptly and do not immediately expose to cold wind, to prevent cold pathogens from entering through open pores.

2. Moderate Exercise – Avoiding Excessive Strain on Tendons and Bones

• Choose low‑impact activities such as slow walking, static leg lifts, and gentle stretching. Reduce frequent mountain climbing, deep squats, stair climbing, and heavy load‑bearing to slow cartilage wear.

• For those with sedentary jobs, stand up and move the knee joints every hour to prevent prolonged qi‑blood stagnation that exacerbates stiffness.

3. Diet and Rest to Consolidate the Foundation – Supporting Liver and Kidney Nourishment

• Maintain regular sleep patterns and avoid chronic late nights that deplete liver‑kidney essence and aggravate internal deficiency.

• Follow a balanced daily diet that includes gentle, nourishing foods for tendons and bones. Reduce raw, cold, and chilled foods to avoid impairing the spleen‑stomach – the source of qi and blood production.
  
  
  Disclaimer:
  This content is a summary of clinical experience and observations from TianDao Traditional Chinese Medicine over many years. It is intended for patient education, public awareness, and scientific exchange. It does not constitute a guarantee of cure, safety, or efficacy for any condition, nor is it a promotional promise.