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。
狐惑病，其症状类似伤寒，有时是因为患伤寒后转化为这种病。患者神情沉默想睡觉，但眼睛牵引不适无法闭合，躺下坐起都感到不安。虫侵蚀咽喉称为“惑”，侵蚀阴部肛门称为“狐”。患者不想吃东西，厌恶食物的气味，面色时而发红、时而发黑、时而发白。如果侵蚀在上部（咽喉），声音就会嘶哑，主治方剂是甘草泻心汤（方剂见痞证篇）。如果侵蚀在下部，则咽喉干燥，用苦参汤清洗患处。如果侵蚀在肛门，用雄黄散熏蒸。取雄黄一味药研成粉末，用两片瓦合在一起，对着肛门烧烟熏蒸。
《脉经》说：病人有的从呼吸向上侵蚀咽喉，有的从下焦向下侵蚀肛门和外阴。侵蚀上部叫“惑”，侵蚀下部叫“狐”。患狐惑病的，主治方剂是猪苓散（方剂尚未考证清楚）。
患病者脉搏数而身体无发热，轻微烦躁，沉默只想躺卧，出汗。刚得病三四天，眼睛红得像斑鸠的眼睛；到了七八天，眼四角发黑（另一版本中，“黑”字前都有“黄”字）。如果能吃东西，说明脓已经形成，主治方剂是赤豆当归散（方剂见下血篇）。
有一位女性患狐惑病，声音嘶哑，嗜睡，眼睛不闭，厌恶食物气味，神志不清。半个月后又出现手足拘挛僵硬，脉搏数而微细。先给她服用一盏竹沥和姜汁的混合液，忽然胸口出汗，腹部鸣响，随即眼睛闭上，神志清醒。于是用人参、白术、当归、陈皮加入竹沥和姜汁煎服，吃了五六帖就好了。
〔《活人书》〕狐惑病与伤寒及湿病都属于虫证，初起时症状像伤寒，或者因患伤寒而变成此疾。大抵伤寒导致腹内热，吃得少，肠胃空虚，三虫活动寻找食物，侵蚀人的五脏及下部，成为虫病。其征候是牙齿颜色暗淡，舌头上布满白色苔垢，严重的嘴唇发黑并有疮疡，四肢沉重，恍惚喜欢睡觉。如果虫侵蚀肛门，腐烂至见到五脏则死亡。应当经常查看上下嘴唇，上唇有疮，说明虫侵蚀内脏；下唇有疮，说明虫侵蚀肛门，杀人非常急迫，多因患痢疾而得到，治疗可用桃仁汤、黄连犀角汤、雄黄锐散主治。
治狐惑病的桃仁汤：
生艾叶、桃仁（去皮尖，炒制，双仁的不使用）、槐花子（捣碎，各一两）、大枣（十五个，去核）。
以上药材加水两盏，煎煮至一盏半，分三次服用。
黄连犀角汤：治疗伤寒及其他疾病之后，体内有虫从下部排出的情况。
黄连（半两）、犀角（一两）、乌梅（七个）、没药（一分）。
以上药材加两大盏半水，煎煮至一盏半，分三次服用。
雄黄锐散：治疗下部疮疡。
雄黄、苦参、青葙子、黄连（各二分）、桃仁（去皮尖，一分）。
以上药物研为散剂，用生艾叶捣汁做成丸药，大小如枣核。用棉布包裹塞入下部，用扁竹叶汁送服或调和更佳。冬季没有艾叶时，只用散剂包裹塞入也可以。
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.