狐惑之为病，状如伤寒，或因伤寒而变成斯病。其状默默欲眠，目牵不得闭，卧起不安。虫蚀于喉咽为惑，
蚀于阴肛为狐。不欲食，恶闻食臭，其面目乍赤乍黑乍白，蚀于上部则声嗄，甘草泻心汤主之。（方见痞。）蚀
于下部则咽干，苦参汤洗之。蚀于肛者，雄黄散熏之。用雄黄一味为末，取二瓦合之，烧向肛熏之。
《脉经》云∶病患或从呼吸上蚀其咽喉，或从下焦蚀其肛阴，蚀上为惑，蚀下为狐。狐惑病者，猪苓散主
之。（方未考究。）
病者脉数无热，微烦，默默但欲卧，汗出，初得之三四日，目赤如鸠眼，七八日目四 （一本，皆有“黄”
字。）黑，若能食者，脓已成也，赤豆当归散主之。（方见下血。）
一妇人狐惑声嗄，多眠，目不闭，恶闻食臭，不省人事，半月后又手足拘强，脉数而微细。先与竹沥、姜
汁一盏服之，忽胸中有汗，腹鸣，即目闭省人事，遂用参、术、归、陈入竹沥、姜汁饮之，五六帖而愈。
〔《活》〕狐惑伤寒与湿 皆虫证，初得状如伤寒，或因伤寒变成此疾。大抵伤寒腹内热，食少，肠胃空
虚，三虫行作求食，蚀人五脏及下部，为 虫病。其候齿无色，舌上尽白，甚者唇黑有疮，四肢沉重，忽忽喜
眠，虫蚀其肛，烂见五脏则死。当数看其上下唇，上唇有疮，虫蚀其脏，下唇有疮，虫蚀其肛，杀人甚急，多
因下痢而得，治 桃仁汤、黄连犀角汤、雄黄锐散主之。
治 桃仁汤
生艾 桃仁（去皮尖，炒，双仁不用） 槐花子（碎。各一两） 大枣（十五个，去核）
上水二盏，煎至一盏半，分三服。
黄连犀角汤 治伤寒及诸病之后，内有 出下部者。
黄连（半两） 犀角（一两） 乌梅（七个） 没药（一分）
上水二大盏半，煎至一盏半，分三服。
雄黄锐散 治下部 疮。
雄黄 苦参 青葙子 黄连（各二分） 桃仁（去皮尖，一分）
上为散，以生艾捣汁为丸，如枣核大。绵裹纳下部，扁竹叶汁更佳。冬月无艾，只用散裹纳亦得。
The disease of Hu-Huo (Gu-Huo, a condition characterized by oral and genital ulcers) presents with symptoms resembling Taiyang disease (Exterior syndrome affecting the Bladder meridian), which may develop from a prior Taiyang disease. The patient appears taciturn and desires sleep, yet cannot close their eyes due to traction or discomfort, feeling restless when lying down or sitting up. Parasitic erosion in the throat and pharynx is termed "Huo" (Confusion/Disorder); erosion in the yin organs and anus is termed "Hu" (Fox). The patient has no appetite, dislikes the smell of food, and their facial complexion fluctuates between red, black, and white. If the erosion occurs in the upper part, hoarseness ensues; this is primarily treated with Gancao Xiexin Tang (Licorice Decoction for Draining the Epigastrium) (see formula under Pi [Stagnation]). If the erosion occurs in the lower part, dryness of the throat results; this is washed with Kushen Tang (Sophora Root Decoction). For erosion of the anus, Xionghuang San (Realgar Powder) is used for fumigation. Take Realgar alone, grind it into powder, place it between two tiles, burn it, and fumigate towards the anus.
The Maijing (Pulse Classic) states: Patients may have erosion extending upwards from respiration to the throat, or downwards from the Lower Jiao (Lower Burner) to the anus and genitals. Erosion in the upper part is called "Huo"; erosion in the lower part is called "Hu." For patients suffering from Hu-Huo disease, Zhuling San (Polyporus Powder) is primarily indicated (the formula has not been thoroughly verified).
The patient presents with a rapid pulse but no fever, slight irritability, taciturnity with a desire to lie down, and sweating. Within three to four days of onset, the eyes become red like those of a turtledove; by seven to eight days, the corners of the eyes turn black (another version includes the character "yellow" before "black"). If the patient can eat, it indicates that pus has formed; this is primarily treated with Chidou Danggui San (Red Bean and Angelica Sinensis Powder) (see formula under Xiexue [Blood in Stool]).
A female patient suffered from Hu-Huo disease with hoarseness, somnolence, inability to close her eyes, aversion to food smells, and unconsciousness. Half a month later, she developed stiffness and rigidity of the hands and feet, with a rapid and fine pulse. Initially, she was given one cup of Zhuli (Bamboo Sap) mixed with Jiangzhi (Ginger Juice). Suddenly, sweat appeared on her chest, and borborygmus (abdominal rumbling) occurred; her eyes closed, and consciousness returned. Subsequently, Renshen (Ginseng), Baizhu (Atractylodes Macrocephala), Danggui (Angelica Sinensis), and Chenpi (Dried Tangerine Peel) were added to the Bamboo Sap and Ginger Juice decoction. After five or six doses, she recovered.
[From *Huren Shu*] Hu-Huo disease, along with Taiyang disease and Dampness diseases, belongs to parasitic syndromes. In the early stage, symptoms resemble Taiyang disease, or it may arise as a complication of Taiyang disease. Generally, Taiyang disease leads to internal heat, reduced food intake, and emptiness in the intestines and stomach, causing the "Three Worms" to move about seeking food, eroding the Five Zang Organs and the lower body, resulting in worm disease. Signs include colorless teeth, a tongue covered entirely with white coating, severe cases presenting with black lips and sores, heavy limbs, and a state of mental confusion with excessive sleepiness. If worms erode the anus, leading to rotting visible to the viscera, death ensues. One should frequently inspect the upper and lower lips: sores on the upper lip indicate visceral erosion by worms; sores on the lower lip indicate anal erosion by worms, which is rapidly fatal. This often arises following dysentery. Treatments include Taoren Tang (Peach Kernel Decoction), Huanglian Xijiao Tang (Coptis and Rhinoceros Horn Decoction), and Xionghuang Ruisan (Realgar Sharp Powder).
Taoren Tang for Treating Hu-Huo Disease:
Sheng Ai Ye (Fresh Mugwort Leaf), Taoren (Peach Kernel, peeled, de-veined, stir-fried; double-kernel kernels are not used), Huaizuizi (Sophora Flower Bud, crushed), each 1 liang; Dazao (Jujube, 15 pieces, pitted).
Add 2 cups of water, decoct until 1.5 cups remain, divide into three doses.
Huanglian Xijiao Tang: Treats conditions after Taiyang disease and other illnesses where parasites exit from the lower part.
Huanglian (Coptis Rhizome, 0.5 liang), Xijiao (Rhinoceros Horn, 1 liang), Wumei (Mume Fruit, 7 pieces), Moyao (Myrrh, 0.1 liang).
Add 2.5 large cups of water, decoct until 1.5 cups remain, divide into three doses.
Xionghuang Ruisan: Treats sores in the lower part.
Xionghuang (Realgar), Kushen (Sophora Root), Qingxiangzi (Celosia Seed), Huanglian (Coptis Rhizome), each 2 fen; Taoren (Peach Kernel, peeled, de-veined, 1 fen).
Grind all ingredients into powder. Use juice from fresh Mugwort leaves pounded out to form pills the size of a jujube pit. Wrap in cotton and insert into the lower orifice. Bianzhuye (Polygonum Aviculare) juice is preferable. In winter, if Mugwort is unavailable, using the powder wrapped for insertion is also acceptable.