治狐惑病。状如伤寒。默默欲眠。目不得闭。卧起不安。蚀于喉为惑。蚀于阴
欲饮食。恶闻食臭。其面目乍赤乍黑乍白。蚀于上部则声嗄。宜此汤。蚀于下部则
苦参汤洗之。蚀于肛者。雄黄熏之。
甘草（四两。炙。） 黄芩 干姜 人参（各三两。） 半夏（半升。） 黄连（一
两。） 大枣（十二枚。）
上七味。以水一斗。煮取六升。去滓。再煎。取三升。温服一升。日三服。
歌曰 伤寒（论中）甘草泻心汤。却妙增参三两匡。彼治痞成下利甚。此医狐惑探源方。
元犀按。虫有情识。故能乱有情识之心脏。而生疑惑矣。虫为血化之物。故仍归于主血
之心
热。杂以辛苦之味。名曰泻心。意深哉。
苦参一升。以水一斗。煎取七升。去滓。熏洗。日三。
庞安时伤寒总病论。用苦参半斤。槐白皮、野狼牙根各四两。煎熏洗之。
雄黄一味为末。筒瓦二枚合之。烧向肛熏之。
歌曰 苦参汤是洗前阴。下蚀（从下而冲于上。）咽干热最深。更有雄黄熏法在。肛门
虫蚀亦
元犀按。蚀于喉为惑。蚀于阴为狐。狐惑病乃感风木湿热之气而生。寒极而化也。苦参
苦寒
取其
寒而
治脉数。无热微烦。默默但欲卧。汗出。初得之三四日。目赤如鸠眼。七八
黑。若能食者。脓已成也。此方主之。并治先便后血。
赤小豆（三升。浸令芽出。曝干。） 当归（十分。）
上二味。杵为散。浆水服方寸匕。日三服。
歌曰 眼 赤黑变多般。小豆生芽曝令干。豆取三升归十分。杵调浆水日三餐。
元犀按。此治湿热侵阴之病。大抵湿变为热则偏重于热。少阴主君火。厥阴主风木。中
见少
出火极似水之色。主以赤豆去湿清热解毒。治少阴之病。当归导热养血。治厥阴之病。下以
浆水。以和胃气。胃气与少阴和。则为火土合德。胃气与厥阴和。则为土木无忤。微乎微乎。
又按。或谓是狐惑病。或谓是阴阳毒病。然二者皆湿热蕴毒之病。金匮列于二证交界处。
即
Treats Hu-Huo disease (a condition characterized by ulceration of the mouth, throat, and genitalia). The presentation resembles Taiyang disease (diseases affecting the exterior/initial stage). The patient is taciturn and desires sleep, yet cannot close their eyes; they are restless when lying down or sitting up. Ulceration in the throat is called "Huo" (Confusion); ulceration in the yin region (genitals) is called "Hu" (Fox). The patient desires food and drink but detests the smell of food. Their facial complexion fluctuates between red, black, and white. If ulcerated in the upper part (throat), the voice becomes hoarse; this decoction (Gancao Xiexin Tang) is indicated. If ulcerated in the lower part (genitals), wash with Kushen Tang. If ulcerated in the anus, fumigate with Xionghuang (Realgar).
Gancao (Licorice Root, 4 liang, honey-fried). Huangqin (Scutellaria Root), Ganjiang (Dried Ginger), Renshen (Ginseng Root) (each 3 liang). Banxia (Pinellia Tuber, half sheng). Huanglian (Coptis Rhizome, 1 liang). Dazao (Jujube Fruit, 12 pieces).
Take the above seven herbs. Add one dou of water, boil to obtain six sheng of liquid. Remove the dregs. Re-boil to obtain three sheng. Take one sheng warm, three times a day.
Verse:
In the Shanghan Lun, Gancao Xiexin Tang (Licorice Decoction for Draining the Heart) works wonders by adding three liang of Renshen to support the righteous qi. It originally treats severe diarrhea resulting from Pi syndrome (epigastric fullness/stagnation); here it is used as a source-seeking formula for Hu-Huo disease.
Commentary by Yuanxi: Insects have consciousness, thus they can disturb the conscious heart and generate confusion. Insects are formed from blood transformation, thus they return to the heart which governs blood. Adding heat-inducing herbs mixed with bitter and acrid flavors is named "Xiexin" (Draining the Heart); the meaning is profound.
Kushen (Sophora Root, 1 sheng). Boil in one dou of water to obtain seven sheng. Remove dregs. Use for fumigation and washing, three times daily.
Pang Anshi in *Shanghan Zongbing Lun* uses half a jin of Kushen, four liang of Huaibai Pi (Bark of Sophora Tree), and four liang of Yelangya Gen (Root of Potentilla chinensis), boiled for fumigation and washing.
Xionghuang (Realgar) alone, ground into powder. Place between two cylindrical tiles. Burn and fumigate towards the anus.
Verse:
Kushen Tang washes the anterior yin. Lower ulceration (rising from below to affect the throat) causes deep dryness and heat. There is also the method of Xionghuang fumigation for anal insect erosion.
Commentary by Yuanxi: Ulceration in the throat is Huo; ulceration in the yin region is Hu. Hu-Huo disease arises from contracting wind-wood damp-heat qi, transforming from extreme cold to heat. Kushen is bitter and cold, utilizing its cold nature... [text fragment] ...to clear heat and dry dampness.
Treats rapid pulse, no fever but slight irritability, taciturnity with desire to sleep, sweating. Within three to four days of onset, the eyes become red like a turtledove's eyes. By seven to eight days, the area around the eyes turns black. If the patient can eat, pus has formed. This formula is indicated. It also treats hematochezia (blood after stool).
Chixiaodou (Adzuki Bean, 3 sheng, soaked until sprouted, then dried in the sun). Danggui (Angelica Sinensis Root, 10 fen).
Grind the above two herbs into a powder. Administer one cunbi (square inch measure) with Jiangshui (fermented grain water), three times daily.
Verse:
Eyes change colors from red to black frequently. Adzuki beans are sprouted and dried. Take three sheng of beans and ten fen of Danggui. Grind and mix with Jiangshui for three meals daily.
Commentary by Yuanxi: This treats diseases where damp-heat invades the yin regions. Generally, when dampness transforms into heat, it leans heavily towards heat. Shaoyin (Lesser Yin) governs Ministerial Fire; Jueyin (Terminal Yin) governs Wind-Wood. The middle reveals Shaoyang (Lesser Yang) fire. The color resembling water emerges from extreme fire. Primarily use Chixiaodou (Adzuki Bean) to remove dampness, clear heat, and resolve toxicity, treating Shaoyin disease. Use Danggui to guide out heat and nourish blood, treating Jueyin disease. Below, use Jiangshui to harmonize Stomach Qi. When Stomach Qi harmonizes with Shaoyin, it is the virtue of Fire and Earth combining; when Stomach Qi harmonizes with Jueyin, Wood and Earth do not conflict. How subtle, how subtle!
Further Commentary: Some say it is Hu-Huo disease; others say it is Yin-Yang Du disease (Yin-Yang Toxic Disease). However, both are diseases of damp-heat accumulating into toxicity. *Jinkui Yaolue* lists it at the boundary of these two syndromes. That is... [text incomplete]