Knee & Ankle (AC)™

TCM herbal formula for acute knee and ankle injuries with swelling, inflammation, and pain — sprains, strains, tendonitis, bursitis, patellar tendonitis, ligament injuries (ACL, PCL, MCL, LCL), meniscus injury, bone fracture, and post-surgical recovery — analgesic; anti-inflammatory; antiarthritic; antirheumatic; activates blood circulation; eliminates blood stasis; clears heat; drains fluids

⚠️ Contraindicated during pregnancy and nursing. Contains Dang Gui (Radix Angelicae Sinensis) — patients on anticoagulant or antiplatelet therapies such as Coumadin (warfarin) should use with caution or not at all. Contains Da Huang (Radix et Rhizoma Rhei) — California Prop 65 warning: "This product contains Da Huang (Radix et Rhizoma Rhei). Read and follow directions carefully. Do not use if you have or develop diarrhea, loose stools, or abdominal pain because Da Huang (Radix et Rhizoma Rhei) may worsen these conditions and be harmful to your health. Consult your physician if you have frequent diarrhea or if you are pregnant, nursing, taking medication, or have a medical condition." Clinical note: this formula is most effective for acute external or trauma injuries with swelling, inflammation, and pain — not the primary formula for osteoarthritis (use Osteo 8 + Knee & Ankle (CR)) or rheumatoid arthritis (use Flex (Heat)). Optimal results occur when herbs are combined with acupuncture, electro-stimulation, and tui-na.

Clinical distinction — Knee & Ankle (AC) vs. Knee & Ankle (CR): Knee & Ankle (AC) is designed for the acute phase — swelling, inflammation, and pain from recent injury or trauma. Knee & Ankle (CR) is designed for chronic knee disorders with repetitive wear and tear, atrophy, and degeneration. For acute injuries, use Knee & Ankle (AC) first; transition to Knee & Ankle (CR) + Flex (MLT) for chronic recovery and rehabilitation.

CLINICAL APPLICATIONS

* Acute knee and ankle injuries: sprain and strain, pain with swelling and inflammation

* Acute leg injuries: damage to soft tissues including muscles, ligaments, tendons, cartilage, and bones

* Soreness of the knee from repeated pressure and use; tendonitis; bursitis; sprain and strain; patellar tendonitis

* Ligament injuries: ACL (anterior cruciate ligament), PCL (posterior cruciate ligament), MCL (medial collateral ligament), LCL (lateral collateral ligament)

* Meniscus injury; bone fracture; dislocation; post-surgical knee and ankle recovery

Background: Musculoskeletal and connective tissue injuries lead to over 10 million clinic visits per year in the United States. Causes may be external (sports injuries, car accidents, trauma), internal (chronic wear and tear; osteoporosis-weakened bones), or both. Acute injuries are characterized by severe pain, swelling, inflammation, and in some cases internal bleeding — treatment should focus on relieving pain, reducing swelling and inflammation, and stopping bleeding. Because the meniscus is a cartilage with very little blood supply, it is critical to increase blood supply to the knees so surrounding soft tissues receive adequate fresh blood and oxygen to facilitate healing. If blood stagnation is not removed, recovery time is prolonged and adhesion is more likely to develop.

Dr. Jun-Qing Luo (tui-na master) clinical notes: 70–80% of MCL and LCL damages involve a posterior shift of those ligaments — treatment involves resetting the soft tissue in an upward motion toward the patella; never stroke MCL/LCL downward toward the popliteal fossa. ACL and PCL injuries do not require excessive force, twisting, or pulling. Tui-na is not recommended during the acute inflammation stage, but if left untreated, tendons and ligaments may adhere and make treatment more difficult and painful. Ligament and meniscus injuries are better treated with tui-na and herbs instead of surgery. Knee pain may not reflect where the problem is — it may be caused by problems in the greater trochanter, tensor fasciae latae, or iliotibial band with structural compensation leading to knee pain. Accurate diagnosis is essential.

Key herb-level clinical data:

— Ru Xiang (Gummi Olibanum / Frankincense / Boswellia): analgesic — relieves pain; anti-inflammatory — reduces swelling and inflammation; antiarthritic — reduces edema and arthritic scores in adjuvant-induced arthritis by suppressing pro-inflammatory cytokines TNF-α and IL-1β; facilitates wound healing by stimulating maturation and differentiation of white blood cells; used as a pair with Mo Yao to dramatically reduce pain from external and trauma injuries

— Mo Yao (Myrrha / Myrrh): analgesic — relieves pain; anti-inflammatory — reduces swelling and inflammation; antiarthritic — suppresses TNF-α and IL-1β; facilitates wound healing; used as a pair with Ru Xiang for trauma and external injuries

— Dang Gui (Radix Angelicae Sinensis / Angelica Sinensis / Dong Quai): analgesic — approximately 1.7x stronger than acetylsalicylic acid; anti-inflammatory — approximately 1.1x stronger than acetylsalicylic acid; inhibits pro-inflammatory mediators including nitric oxide and prostaglandin E2 in peritoneal macrophages; tonifies blood; activates blood circulation; caution with anticoagulants

— Du Huo (Radix Angelicae Pubescentis / Pubescent Angelica Root): mild sedative; marked analgesic and anti-inflammatory activities; channel-guiding herb to the lower extremities; opens peripheral channels and collaterals to relieve pain

— Da Huang (Radix et Rhizoma Rhei / Rhubarb Root): analgesic and anti-inflammatory — emodin and rhein inhibit inducible nitric oxide synthase; drains swelling and inflammation from acute physical injuries; one of the most commonly used herbs for acute trauma; see California Prop 65 warning above

— Chuan Xiong (Rhizoma Chuanxiong / Ligusticum / Szechuan Lovage Root): anti-inflammatory — inhibits TNF-α production and bioactivity; tonifies blood; activates blood circulation

— Chuan Mu Xiang (Radix Vladimiriae / Vladimiria Root): anti-inflammatory — significant inhibitory effects on INF-γ-induced nitric oxide production; tonifies qi; activates qi circulation

— San Qi (Radix et Rhizoma Notoginseng / Notoginseng / Tian Qi): anti-inflammatory — suppresses LPS-induced TNF-α, COX-2, IL-1, and IL-6; osteogenic — promotes osteogenesis of bone marrow stromal cells by targeting osteogenesis-associated genes via gap junction intercellular communication; enhances bone mineral density and bone strength; activates blood circulation; eliminates blood stasis

— Su Mu (Lignum Sappan / Sappan Wood / Caesalpinia): anti-inflammatory — inhibits nitric oxide activity; antiarthritic — attenuates collagen-induced arthritis by decreasing IL-1β, IL-6, TNF-α, and PGE2 and inhibiting COX-2 and NF-κB; opens peripheral channels and collaterals

— Wu Yao (Radix Linderae / Lindera Root): anti-inflammatory — inhibits production of inflammatory mediators from macrophages by blocking NF-κB and MAPKs signaling pathways; antirheumatic — protects against joint destruction in type II collagen-induced rheumatoid arthritis model; tonifies qi; activates qi circulation

— Di Huang (Radix Rehmanniae / Rehmannia): anti-inflammatory — reduces swelling and inflammation through influence on the endocrine system; increases plasma levels of adrenocortical hormones even in the presence of dexamethasone; clinical study: used in herbal formula to treat 12 patients with rheumatoid arthritis — success; tonifies blood

— Gan Cao (Radix et Rhizoma Glycyrrhizae / Licorice Root): anti-inflammatory — enhances glucocorticoid effect through increased production/secretion and decreased liver metabolism; glycyrrhizin and glycyrrhetinic acid vs. cortisone anti-inflammatory ratio approximately 10:1; clinically treats pain, inflammation, edema, arthritis, spasms, and cramps; tonifies qi; harmonizes the formula

— Xu Duan (Radix Dipsaci / Teasel Root / Dipsacus): osteogenic and antiosteoporotic — promotes osteoblast proliferation and differentiation without affecting osteoclast activity; increases rate of tissue regeneration of damaged bones; opens peripheral channels and collaterals

— Ze Lan (Herba Lycopi / Lycopus / Bugleweed): activates blood circulation; eliminates blood stasis; drains swelling associated with the inflammatory stage in acute pain conditions

— Hong Hua (Flos Carthami / Safflower / Carthamus): activates blood circulation; eliminates blood stasis; treats pain

— Chi Shao (Radix Paeoniae Rubrae / Red Peony Root): activates blood circulation; eliminates blood stasis; clears heat

— Tao Ren (Semen Persicae / Peach Seed): activates blood circulation; eliminates blood stasis

— Mu Gua (Fructus Chaenomelis / Chinese Quince / Chaenomeles): relaxes muscles; treats cramps, spasms, and stiffness; helps repair damaged tendons and ligaments

— Chuan Niu Xi (Radix Cyathulae / Cyathula Root): channel-guiding herb — directs formula to the lower extremities; increases blood circulation to the knees

WESTERN THERAPEUTIC ACTIONS

* Analgesic — Ru Xiang + Mo Yao (trauma and external injuries); Dang Gui (1.7x stronger than aspirin); Du Huo (marked analgesic); Da Huang (emodin + rhein, iNOS inhibition); Gan Cao (pain, spasms, cramps)

* Anti-inflammatory — Ru Xiang + Mo Yao (TNF-α↓, IL-1β↓); Dang Gui (nitric oxide↓, PGE2↓, 1.1x stronger than aspirin); Du Huo (marked anti-inflammatory); Da Huang (emodin + rhein, iNOS inhibition); Chuan Xiong (TNF-α↓); Chuan Mu Xiang (INF-γ-induced NO↓); San Qi (TNF-α↓, COX-2↓, IL-1↓, IL-6↓); Su Mu (nitric oxide↓, COX-2↓, NF-κB↓, IL-1β↓, IL-6↓, TNF-α↓, PGE2↓); Wu Yao (NF-κB↓, MAPKs↓); Di Huang (adrenocortical hormones↑); Gan Cao (glucocorticoid↑, cortisone ratio 10:1)

* Antiarthritic — Ru Xiang + Mo Yao (adjuvant-induced arthritis: edema↓, arthritic scores↓, TNF-α↓, IL-1β↓); Su Mu (collagen-induced arthritis: IL-1β↓, IL-6↓, TNF-α↓, PGE2↓, COX-2↓, NF-κB↓); Di Huang (12 patients rheumatoid arthritis)

* Antirheumatic — Wu Yao (protects against joint destruction in type II collagen-induced rheumatoid arthritis)

* Osteogenic / bone healing — San Qi (osteogenesis of bone marrow stromal cells, bone mineral density↑, bone strength↑); Xu Duan (osteoblast proliferation↑, bone tissue regeneration↑)

* Wound healing — Ru Xiang + Mo Yao (white blood cell maturation and differentiation↑)

CHINESE THERAPEUTIC ACTIONS

* Activates blood circulation; eliminates blood stasis; treats pain (San Qi, Ze Lan, Tao Ren, Chi Shao, Hong Hua, Dang Gui, Chuan Xiong, Di Huang)

* Tonifies qi; activates qi circulation (Gan Cao, Chuan Mu Xiang, Wu Yao)

* Clears heat; drains swelling and inflammation from acute trauma (Da Huang, Ze Lan, Chi Shao)

* Opens peripheral channels and collaterals; relieves pain (Su Mu, Xu Duan, Du Huo)

* Directs formula to lower extremities; increases blood circulation to knees (Chuan Niu Xi, Du Huo)

* Relaxes muscles; repairs tendons and ligaments (Mu Gua)

* Harmonizes the formula (Gan Cao)

DOSAGE

Standard: 3–4 capsules three times daily. For acute pain, increase to 5–6 capsules every four to six hours as needed. For quick and maximum effectiveness, take on an empty stomach with warm water.

Supplementary formulas: Severe pain — add Herbal ANG. Severe inflammation and swelling — add Astringent Complex. Heat manifestations or re bi (heat painful obstruction) — add Flex (Heat). Cold and damp manifestations or zhuo bi (fixed painful obstruction) — add Flex (CD). Acute injury, trauma, or bone fracture — use Flex (TMX). Ligament injury — add Flex (MLT). Atrophy and degeneration — use Osteo 8. Bone spurs — add Flex (SPR). Chronic knee disorders (repetitive wear and tear) — use Knee & Ankle (CR) + Flex (MLT).

Nutrition: Sulfur helps absorption of calcium — essential for repair and rebuilding of bones, tendons, cartilage, and connective tissues. Consume foods high in sulfur: asparagus, eggs, fresh garlic, and onions. Histidine (amino acid) removes excess copper and iron found in arthritic patients — consume foods high in histidine: rice, wheat, and rye. Fresh pineapple contains bromelain — an enzyme excellent for reducing inflammation. Fish oil may help alleviate pain associated with rheumatoid arthritis. Avoid spicy food, caffeine, citrus fruits, sugar, milk, dairy products, and red meat. Decrease intake of sour foods and citrus — their constricting nature may contribute to further stagnation in the channels and collaterals.

Lifestyle: For obese patients, weight loss lessens pressure on joints and helps relieve pain. Patients active in sports should rest the knee for full recovery. Patients with meniscus and ligament injuries should rest and move the knee as little as possible — full movement or sports should not be performed until the knee is completely healed; jumping or sudden landing are contraindicated. These principles also apply to the ankles.

CASE STUDIES

— 35-year-old male: Acute ankle sprains from sliding into second base at softball — swelling and bruising around both ankles; had iced and taken NSAIDs the night before; qi and blood stagnation. Knee & Ankle (AC) 5 caps 3x daily + rest + ice + acupuncture. Result: full recovery after 3 weeks. Stretching and warming up before games recommended for future prevention.

— S.V., 30-year-old female: Knee pain with loss of range of motion and scar tissue buildup; 2 weeks post-surgery; BP 108/64 mmHg, HR 64 bpm; qi and blood stagnation. Knee & Ankle (AC) 4 caps 4x daily. Result at 2 days: pain less severe. After 1 week: reduced to 4 caps 2x daily for an additional week.

— A.S., 45-year-old female: Right lateral ankle sprain 3 days prior — purplish color and swelling around ankle; local blood stagnation. Flex (TMX) + Knee & Ankle (AC). Result at 3 days: 50% better. Flex (TMX) discontinued at 8 days (90% better). Continued Knee & Ankle (CR) for 1 additional week — 100% better.

— E.F., 60-year-old male: Knee pain above right patella for 2 days; X-ray confirmed bone spur; aggravated by weight bearing or change of position; slight swelling and warm temperature; no preceding trauma; qi and blood stagnation. Knee & Ankle (AC) + Flex (SPR) 2 caps each 3x daily. Result at 6 weeks: condition resolved.

Related Reading

Also see: Knee & Ankle (CR) – for chronic knee and ankle disorders with atrophy and degeneration | Flex (TMX) – for acute trauma and bone fracture | Flex (MLT) – for ligament injuries | Flex (Heat) – for heat painful obstruction and rheumatoid arthritis | Flex (CD) – for cold and damp painful obstruction | Flex (SPR) – for bone spurs | Osteo 8 – for osteoarthritis and joint degeneration | Herbal ANG – for severe pain | Astringent Complex – for severe inflammation and swelling | Pain Relief & Musculoskeletal Support Collection.