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Chen Linchuan stated: Whenever there is headache, fever, pain in the limbs and joints, constipation, or vomiting with weakness and flexion of the feet, this is Hong Kong Jiao (a disease characterized by swelling and heaviness of the lower legs and weakness). For mild cases, Xiangsu San (Perilla and Cyperus Powder) can be administered with added Mu Gua (Chaenomeles Fruit), Bing Lang (Areca Seed), and Sheng Jiang (Fresh Ginger), decocted and taken orally. Subsequently, treatment should be tailored to the specific syndrome. It must be known that patients with Hong Kong Jiao typically develop symptoms starting from the feet. Symptoms may initially present as slowness, weakness, pain, and numbness in the feet; sudden collapse while walking; swelling and fullness in both calves; emaciation of the feet and knees; palpitations in the heart; insensitivity in the lower abdomen; skin induration with loss of pain sensation; generalized muscle spasms; nausea and vomiting upon seeing food or smelling food odors; chest distension and shortness of breath; or generalized body soreness. All these are manifestations of Hong Kong Jiao. This corresponds to what the Yellow Emperor described as "Huan Feng Shi Bi" (Sluggish Wind-Dampness Bi Syndrome). Slowness and weakness constitute "Huan Feng" (Sluggish Wind), while pain constitutes "Shi Bi" (Dampness Bi). If cold pathogen invades the Three Yang meridians, the affected areas will necessarily feel cold; Xiao Xuming Tang (Minor Continuation of Life Decoction) is the primary formula. (It is best to add fresh ginger juice after decoction.) If summer-heat pathogen invades the Three Yin meridians, the affected areas will necessarily feel hot; Xiao Xuming Tang should be used without Fu Zi (Aconite Lateral Root) and with Gui Zhi (Cinnamon Twig) reduced by half. For severe restlessness, Zi Xue (Purple Snow) is most effective. If Zi Xue is unavailable, Bai He (Lily Bulb) and Bo He (Mint) decocted in cold water for administration is also excellent. For constipation, Pi Yue Wan (Splee Restriction Pill), Ma Ren Wan (Hemp Seed Pill), or San He San (Three Harmonies Powder) should be used. Acupuncture and moxibustion are still preferred. Taking tonifying medicines and washing the affected parts with herbal decoctions are major taboos among physicians.

Women suffering from Hong Kong Jiao differ from men. In men, it arises from Kidney deficiency allowing Wind-Dampness to invade. In women, it arises from Qi deficiency in the Bao Luo (Uterine Collaterals) allowing Wind-Toxin to bind. Since the Bao Luo belongs to the Kidney, and the Kidney governs the waist and feet, and the meridians of the Liver, Spleen, and Kidney all originate at the ten toes of the feet, if the Zang-Fu organs are deficient, Wind Pathogen first lodges in the feet, ascending from below and disturbing Qi, hence the name Hong Kong Jiao. These conditions result from constitutional weakness, exposure to wind while cooling off, prolonged sitting in damp lowlands, postpartum overexertion, or anger/sorrow injuring the Liver, leading to Heart Qi deficiency and obstruction of menstruation. Due to deficiency allowing Wind-Toxin invasion, the pathogen transmits into the sinews and bones, causing skin insensitivity, bone and sinew pain, inability to move limbs freely, sinew constriction and spasms, intermittent cold pain, swelling, foot numbness and weakness, generalized spasms, dizziness, irritability, vomiting upon seeing food, mental confusion, joint soreness, dark yellow urine, and constipation. For such syndromes, treating women differs from men because women have irregular Qi and Blood, and suffer damage from pregnancy and childbirth. Therefore, treating widows, nuns, and ordinary wives requires distinct approaches, which illustrates this principle.

Xue Ji quoted Mr. Yan Yonghe: The aforementioned condition is often unnoticed at onset and manifests due to other illnesses, starting from the feet. Symptoms include foot slowness, weakness, numbness, and pain preventing walking; calf swelling; thin feet and knees; heart palpitations; abdominal insensitivity; generalized spasms; nausea upon seeing food; chest distension and shortness of breath; and generalized soreness. A pulse that is Floating and Wiry indicates Wind. Damp and Weak indicates Dampness. Surging and Rapid indicates Heat. Slow and Choppy indicates Cold. In men, it stems from Kidney Qi depletion; in women, from Blood Sea deficiency and Seven Emotions. I suggest that if the Three Yin meridians of the foot are weak, use Huan Shao Dan (Restore Youth Pill). If Spleen Qi is deficient and cold, use Ba Wei Wan (Eight-Ingredient Pill). If food stagnation causes hip and thigh soreness/swelling/pain, indicating Spleen Qi sinking, use Liu Jun Zi Tang (Six Gentlemen Decoction) with added Chai Hu (Bupleurum Root) and Sheng Ma (Cimicifuga Rhizome); if ineffective, Ba Wei Wan is required. If fever, thirst, irregular menstruation, and leg weakness occur, indicating Blood deficiency and Fire dryness in the Three Yin meridians of the foot, use Liu Wei Di Huang Wan (Six-Ingredient Pill with Rehmannia) and Ba Wei Wan together. People in the West are prone to this condition, originally due to vegetarian diets rich in dairy, causing Spleen-Stomach congestion and calf/foot swelling. In the South, it also occurs due to rich, greasy foods causing Damp-Heat pouring downward. Thus, ancients called it "Yong Ji" (Congestion Disease), using formulas that mostly unblock and disperse. However, if caused by excessive sexual activity damaging the Three Yin, treatment must focus on consolidating the root. Therefore, Liu Wu Fu Zi Tang (Six-Ingredient Aconite Decoction) is a sacred medicine for Yuan Qi deficiency and internal Cold invasion.

Da Fu Pi San (Betel Nut Peel Powder): Treats Wind-Toxin Hong Kong Jiao in women, featuring joint soreness, mental confusion, and malarial-like symptoms.
Ingredients: Da Fu Pi (Areca Peel), Sang Bai Pi (Mulberry Root Bark), Mu Tong (Akebia Stem), Qiang Huo (Notopterygium Rhizome), Chi Shao Yao (Red Peony Root), Jing Jie (Schizonepeta Spike), Du Huo (Angelica Pubescens Root), Qing Ju Pi (Green Tangerine Peel), Gan Mu Gua (Dried Chaenomeles Fruit), Zhi Ke (Bitter Orange Fruit), Zi Su Ye (Perilla Leaf).
Preparation: Coarsely crush. Take 8 qian per dose, decoct with 1.5 cups of water, 5 slices of Fresh Ginger, and 7 cun of Scallion White until reduced to 1 cup. Strain and take warm before meals.

Zi Su Yin (Perilla Infusion): Treats Wind-Toxin Hong Kong Jiao in women, featuring epigastric fullness, phlegm-fluid retention, anorexia, and heavy, swollen feet.
Ingredients: Zi Su Ye (Perilla Leaf), Mu Tong (Akebia Stem), Hui Xiang (Fennel Fruit), Sang Gen Bai Pi (Mulberry Root Bark), Du Huo (Angelica Pubescens Root), Qiang Huo (Notopterygium Rhizome), Gan Mu Gua (Dried Chaenomeles Fruit), Qing Ju Pi (Green Tangerine Peel), Zhi Gan Cao (Prepared Licorice Root), Da Fu Pi (Betel Nut Peel), Zhi Ke (Bitter Orange Fruit), Jing Jie (Schizonepeta Spike).
Preparation: Coarsely crush. Take 8 qian per dose, decoct with 1.5 cups of water, 5 slices of Fresh Ginger, and one stalk of Scallion White with roots until reduced to 1 cup. Strain and take warm at any time, twice daily.

Si Bai San (Four Whites Powder): Treats Qi and Blood deficiency with fever, night sweats, anorexia, emaciated limbs, sinew constriction, and foot pain preventing walking.
Ingredients: Huang Qi (Astragalus Root), Hou Po (Magnolia Bark), Yi Zhi Ren (Alpinia Oxyphylla Fruit), Chen Pi (Tangerine Peel), Huo Xiang (Patchouli Herb), Bai Bian Dou (White Hyacinth Bean), Bai Zhu (Atractylodes Macrocephala Rhizome), Bai Fu Ling (Poria), Bai Dou Kou (White Cardamom Seed), Ren Shen (Ginseng Root), Zhi Gan Cao (Prepared Licorice Root), Tian Tai Yu Dao (Tiantai Arisaema Rhizome), Shao Yao (Peony Root), Tan Xiang (Sandalwood Wood), Chen Xiang (Agarwood Wood).
Preparation: Grind into fine powder. Take 3 qian per dose, decoct with 1 cup of water, 3 slices of Fresh Ginger, and one Jujube until reduced to 0.7 cup. Take warm, twice daily. Once other symptoms subside but foot spasm/pain persists, treat with Cang Zhu Wan.

Cang Zhu Wan (Atractylodes Pill): Primarily treats Dry/Wet Hong Kong Jiao, sinew constriction/pain, inability to walk, and tonifies the lower body.
Ingredients: Ru Xiang (Olibanum), Mo Yao (Myrrh), Chuan Niu Xi (Cyathula Root), Qing Yan (Rock Salt), Shu Ai Ye (Prepared Mugwort Leaf), Quan Xie (Scorpion), Chuan Wu Tou (Aconitum Carmichaelii Lateral Root).
Preparation: Grind ingredients into fine powder. Mix thoroughly. Cut the top off one large Mu Gua (Chaenomeles), remove flesh, insert herbs, seal with the top, place in black beans, and steam until very soft. Remove skin, grind with herbs into paste, mix with sufficient raw Cang Zhu (Atractylodes Rhizome) powder, and form pills the size of paulownia seeds. Take 50 pills on an empty stomach with Mu Gua soup or warm salt wine, three times daily. Avoid blood products and garlic.

Discussions on other syndromes are detailed in the main section on Miscellaneous Diseases.