香港脚风寒湿热病，往来寒热状伤寒，腿脚痛肿热为火，不肿不热是寒干。
【注】香港脚乃内有湿热，外感风寒，相合为病，故往来寒热，状类伤寒。两脚腿痛肿
热如火者，是火盛也，不肿不热而痛者，是寒盛也，名曰干香港脚。
香港脚脉急少腹顽，不三五日入心间，呕吐喘满目额黑，恍惚谵妄命难全。
【注】香港脚脉急，少腹顽木，不知痛痒，不过三五日内，其邪必入心间。若入心间，呕
吐喘满，是为香港脚冲心之证。目额皆黑，恍惚谵妄，则是水来克火之征，故曰命难全也。
攒风散 羌活导滞汤 胜湿饼子 五积散 独活寄生汤
香港脚表解攒风散，麻桂杏草萆乌良，里解导滞羌独活，防己当归枳大黄，湿盛重肿
胜湿饼，二丑荞面遂成方，寒湿五积加附子，寒虚独活寄生汤。
【注】初病香港脚，表实无汗，用攒风散汗之，即麻黄、桂枝、杏仁、甘草、萆 、炮
川乌也，里实热盛，二便不利，用羌活导滞汤下之，即羌活，独活、防己、当归、枳实、
大黄也。湿盛重肿，用胜湿饼子，即黑丑、白丑头末，甘遂末，各五钱，荞麦面一两五钱，
水和作饼，三钱，煮熟，空心茶清服逐之。寒湿者，用五积散加附子治之，方在伤寒门。寒
虚者，用独活寄生汤补之，方在痹门。
当归拈痛汤
当归拈痛虚湿热，茵陈四苓与羌防，人参当归升芩草，苦参知母葛根苍。
【注】湿热香港脚而形气虚者，宜用当归拈痛汤，即茵陈，白术、茯苓、猪苓、泽泻、羌
活、防己、人参、当归，升麻，黄芩、甘草、苦参、知母、葛根、苍术也。
加味苍柏散
加味苍柏实湿热，二活二术生地黄，知柏芍归牛膝草，木通防己木瓜榔。
【注】湿热香港脚而形质实者，宜用加味苍柏散，即羌活、独活、苍术、白术、生地黄、
知母、黄柏、赤芍、当归、牛膝、甘草、木通、防己、木瓜、槟榔也。
大防风汤
两膝肿大而疼痛，髀胫枯细鹤膝风，大防风附羌牛杜，十全大补减茯苓。
【注】两膝肿大疼痛，膝上至髀、膝下胫足枯细，但存皮骨，两膝状若鹤膝，故名鹤
膝风也。宜大防风汤，即防风、附子、羌活、牛膝、杜仲、人参、白术、炙草、当归、川
芎、白芍、熟地、炙 、肉桂也。此病若得之于痢疾病后者，名曰痢风，亦用此方。
香港脚（一种以腿足肿痛为主要表现的疾病）由风寒湿热邪气致病，其症状表现为寒热往来，类似伤寒；若腿脚疼痛、肿胀且发热，属于火邪（热盛）所致；若不肿不热而疼痛，则是寒邪（寒湿）所致。
【注】香港脚是由于体内素有湿热，外感风寒之邪，内外合邪而发病，因此出现寒热往来的症状，表现类似伤寒。如果两腿及足部疼痛、肿胀且灼热如火，这是火邪亢盛的表现；如果不肿不热但疼痛，这是寒邪亢盛的表现，这种病症称为“干香港脚”。
香港脚患者脉象紧急，小腹部感觉麻木僵硬，不知痛痒，若在三五日内病邪侵入心脏区域，会出现呕吐、气喘、胸满、目眶及前额发黑、神志恍惚、胡言乱语等症状，此时病情危重，难以保全生命。
【注】香港脚患者脉象紧急，小腹部麻木僵硬，不知痛痒，不过三五天内，病邪必然侵入心间。如果病邪侵入心间，出现呕吐、气喘、胸满，这是香港脚冲心的证候。如果眼眶和前额都发黑，神志恍惚、胡言乱语，这是水邪克制心火的征象，所以说性命难保。
若香港脚表证已解，使用攒风散，方含麻黄、桂枝、杏仁、甘草、萆薢、川乌良（炮川乌）；若里证已解且热盛，使用羌活导滞汤，方含羌活、独活、防己、当归、枳实、大黄；若湿气盛且肿胀严重，使用胜湿饼子，方由黑丑、白丑头末各五钱，甘遂末，荞麦面一两五钱组成，用水和成饼状，每次三钱，煮熟后空腹用茶清送服以逐湿；若是寒湿证，使用五积散加附子治疗，该方记载于伤寒门；若是寒虚证，使用独活寄生汤补益，该方记载于痹门。
当归拈痛汤适用于湿热香港脚且体质虚弱者，方含茵陈、四苓散（白术、茯苓、猪苓、泽泻）、羌活、防风、人参、当归、升麻、黄芩、甘草、苦参、知母、葛根、苍术。
【注】对于湿热香港脚且形体正气虚弱者，适宜使用当归拈痛汤，方剂组成包括茵陈、白术、茯苓、猪苓、泽泻、羌活、防己、人参、当归、升麻、黄芩、甘草、苦参、知母、葛根、苍术。
加味苍柏散适用于湿热香港脚且体质实证者，方含羌活、独活、苍术、白术、生地黄、知母、黄柏、赤芍、当归、牛膝、甘草、木通、防己、木瓜、槟榔。
【注】对于湿热香港脚且形体实质充实者，适宜使用加味苍柏散，方剂组成包括羌活、独活、苍术、白术、生地黄、知母、黄柏、赤芍、当归、牛膝、甘草、木通、防己、木瓜、槟榔。
若双膝肿大且疼痛，大腿和小腿枯细，仅存皮骨，双膝形状像鹤的膝盖，称为鹤膝风，宜用大防风汤，方含防风、附子、羌活、牛膝、杜仲、人参、白术、炙甘草、当归、川芎、白芍、熟地黄、炙黄芪、肉桂。此病若继发于痢疾之后，称为痢风，也使用此方治疗。
【注】双膝肿大疼痛，膝盖以上至大腿、膝盖以下至小腿枯细，仅剩皮骨，双膝形状如同鹤膝，因此命名为鹤膝风。适宜使用大防风汤，方剂组成包括防风、附子、羌活、牛膝、杜仲、人参、白术、炙甘草、当归、川芎、白芍、熟地黄、炙黄芪、肉桂。如果此病是在患痢疾之后得的，称为痢风，也使用这个方子。
Hongjiao (a disease characterized mainly by swelling and pain in the legs and feet) is caused by wind-cold-damp-heat pathogens. Its symptoms manifest as alternating chills and fever, resembling Shanghan (Cold Damage). If the legs and feet are painful, swollen, and hot, it is due to Fire (excess heat); if they are not swollen or hot but painful, it is due to Cold (cold-dampness).
[Annotation] Hongjiao arises from internal damp-heat combined with external contraction of wind-cold, leading to alternating chills and fever, presenting similarly to Shanghan. If both legs and feet are painful, swollen, and burning hot like fire, this indicates an excess of Fire; if there is no swelling or heat but only pain, this indicates an excess of Cold. This condition is named "Dry Hongjiao."
In Hongjiao, the pulse is rapid/tight, and the lower abdomen feels numb and stiff, with loss of sensation to pain and itch. Within three to five days, if the pathogen invades the Heart region, symptoms such as vomiting, panting, chest fullness, blackening of the eyes and forehead, mental confusion, and delirium may occur. At this stage, the condition is critical and life-threatening.
[Annotation] In Hongjiao, a rapid/tight pulse accompanied by numbness and stiffness in the lower abdomen, with insensitivity to pain and itch, suggests that within three to five days, the pathogen will inevitably invade the Heart. If it invades the Heart, resulting in vomiting, panting, and chest fullness, this is the syndrome of Hongjiao rushing to the Heart. Blackening of the eye sockets and forehead, along with mental confusion and delirium, signifies Water overcoming Fire, hence stating that life cannot be preserved.
Zan Feng San (Gathering Wind Powder), Qiang Huo Dao Zhi Tang (Notopterygium Decoction for Guiding Out Stagnation), Sheng Shi Bing Zi (Dampness-Overcoming Cake), Wu Ji San (Five Accumulations Powder), Du Huo Ji Sheng Tang (Angelica Pubescens Decoction for Nourishing Life).
If the exterior syndrome of Hongjiao has resolved, use Zan Feng San, which contains Mahuang (Ephedrae Herba), Guizhi (Cinnamomi Ramulus), Xingren (Armeniacae Semen Amarum), Gancao (Glycyrrhizae Radix et Rhizoma), Bibo (Dioscoreae Hypoglaucae Rhizoma), and Pao Chuanwu (Prepared Aconiti Lateralis Radix). If the interior syndrome has resolved and heat is excessive, use Qiang Huo Dao Zhi Tang, which contains Qianghuo (Notopterygii Rhizoma et Radix), Duhuo (Angelicae Pubescentis Radix), Fangji (Stephaniae Tetrandrae Radix), Danggui (Angelicae Sinensis Radix), Zhishi (Aurantii Fructus Immaturus), and Dahuang (Rhei Radix et Rhizoma). If dampness is excessive with severe swelling, use Sheng Shi Bing Zi, composed of Heiqiu (Semen Cassiae) and Baiqiu (Semen Cassiae) head powder, each 5 qian, Gansui (Kansui Radix) powder, and Qiaomai mian (Fagopyri Tatarici Farina) 1.5 liang. Mix with water to form cakes, take 3 qian per dose, boiled, taken on an empty stomach with tea infusion to purge dampness. For cold-dampness, treat with Wu Ji San plus Fuzi (Aconiti Lateralis Praeparata Radix), recorded in the Shanghan section. For cold-deficiency, tonify with Du Huo Ji Sheng Tang, recorded in the Bi (Obstruction) section.
Dang Gui Nian Tong Tang (Angelica Sinensis Decoction for Relieving Pain)
Dang Gui Nian Tong Tang is suitable for damp-heat Hongjiao in patients with deficient constitution. It contains Yinchen (Artemisiae Scopariae Herba), Si Ling San (Four Poria Powder: Baizhu, Fuling, Zhuling, Zexie), Qianghuo, Fangji, Renshen (Ginseng Radix), Danggui, Shengma (Cimicifugae Rhizoma), Huangqin (Scutellariae Radix), Gancao, Kushen (Sophorae Flavescentis Radix), Zhimu (Anemarrhenae Rhizoma), Gegen (Puerariae Lobatae Radix), and Cangzhu (Atractylodis Rhizoma).
[Annotation] For damp-heat Hongjiao with deficient qi and body constitution, Dang Gui Nian Tong Tang is appropriate. The formula consists of Yinchen, Baizhu (Atractylodis Macrocephalae Rhizoma), Fuling (Poria), Zhuling (Polyporus), Zexie (Alismatis Rhizoma), Qianghuo, Fangji, Renshen, Danggui, Shengma, Huangqin, Gancao, Kushen, Zhimu, Gegen, and Cangzhu.
Jia Wei Cang Bai San (Modified Cangbai Powder)
Jia Wei Cang Bai San is suitable for damp-heat Hongjiao in patients with solid/excess constitution. It contains Qianghuo, Duhuo, Cangzhu, Baizhu, Shengdihuang (Rehmanniae Radix Recens), Zhimu, Huangbai (Phellodendri Cortex), Chishao (Paeoniae Radix Rubra), Danggui, Niuxi (Achyranthis Bidentatae Radix), Gancao, Mutong (Akebiae Caulis), Fangji, Mugua (Chaenomelis Fructus), and Binglang (Arecae Semen).
[Annotation] For damp-heat Hongjiao with a solid physical constitution, Jia Wei Cang Bai San is appropriate. The formula consists of Qianghuo, Duhuo, Cangzhu, Baizhu, Shengdihuang, Zhimu, Huangbai, Chishao, Danggui, Niuxi, Gancao, Mutong, Fangji, Mugua, and Binglang.
Da Fang Feng Tang (Great Saposhnikovia Decoction)
If both knees are swollen and painful, with the thighs and calves emaciated while the knees remain large, resembling a crane's knee, it is called He Xi Feng (Crane Knee Wind). Use Da Fang Feng Tang, containing Fangfeng (Saposhnikoviae Radix), Fuzi, Qianghuo, Niuxi, Duzhong (Eucommiae Cortex), Renshen, Baizhu, Zhi Gancao (Honey-fried Glycyrrhizae Radix et Rhizoma), Danggui, Chuanxiong (Ligustici Chuanxiong Rhizoma), Baishao (Paeoniae Radix Alba), Shudihuang (Rehmanniae Radix Preparata), Zhi Huangqi (Astragali Radix), and Rougui (Cinnamomi Cortex). If this disease occurs after dysentery, it is called Li Feng (Dysentery Wind), and this formula is also used.
[Annotation] Swelling and pain in both knees, with emaciation from the thighs above the knees to the calves below, leaving only skin and bone, and knees shaped like a crane's knee, is therefore named Crane Knee Wind. Da Fang Feng Tang is appropriate, consisting of Fangfeng, Fuzi, Qianghuo, Niuxi, Duzhong, Renshen, Baizhu, Zhi Gancao, Danggui, Chuanxiong, Baishao, Shudihuang, Zhi Huangqi, and Rougui. If this disease is contracted following dysentery, it is named Li Feng, and this same formula should be used.