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After the fever subsides and consciousness returns, if residual heat remains unclear, this is due to latent fire flaring up again. It can be cured by regulating with Huanglian Jiedu Tang (Coptis Decoction for Poisoning) and Zhuye Shigao Tang (Bamboo Leaf and Gypsum Decoction).

(External symptoms include drowsiness with inability to close eyes, and hoarseness.)
The Huo-Huo disease presents with symptoms resembling Taiyang disease (Sun-Tang Disease/Exterior Syndrome), sometimes developing from Taiyang disease. The presentation involves silence, a desire to sleep but an inability to keep the eyes closed, and restlessness whether lying down or sitting up. Parasites eroding the throat are called "Huo" (Huò), while those eroding the yin and anus are called "Hu" (Hú). The patient loses appetite and dislikes the smell of food. If erosion occurs in the upper part (throat), causing hoarseness, Gancao Xiexin Tang (Licorice Inward-Draining Decoction) is the primary formula (see Pi syndrome section). If erosion occurs in the lower part, causing dryness of the throat, Kushen Tang (Sophora Decoction) should be used for washing. If erosion occurs at the anus, Xionghuang San (Realgar Powder) is used for fumigation. The method involves grinding Realgar into powder, placing it between two tiles, igniting it, and fumigating the anus.

The Mai Jing (Pulse Classic) states: Patients may have their throats eroded via respiratory qi, or their anal yin eroded via the Lower Jiao (Lower Burner). Erosion of the upper part is called Huo; erosion of the lower part is called Hu. For Huo-Huo disease, Zhuling San (Polyporus Powder) is the primary formula (formula not verified). The patient has a rapid pulse, no fever, slight irritability, silence, a desire to lie down, and sweating. Within three to four days of onset, the eyes turn red like a turtledove's eyes; by seven to eight days, the corners of the eyes turn black (another version adds the character 'yellow' after 'black'). If the patient can eat, it indicates that pus has formed. Chidou Danggui San (Red Bean and Angelica Powder) is the primary formula (see Miscellaneous Diseases, Hematochezia section).

Appendix:
A female patient suffered from Huo-Huo disease with hoarseness, excessive sleepiness, inability to close her eyes, aversion to food smells, and loss of consciousness. Half a month later, she developed stiffness and spasms of the hands and feet, with a rapid yet fine and weak pulse. Initially, one cup of Zhuli Jiangzhi (Bamboo Sap and Ginger Juice) was administered. Suddenly, sweat appeared on the chest, abdominal borborygmi occurred, and her eyes closed as consciousness returned. Subsequently, Renshen Baizhu Danggui Chenpi Yin (Ginseng, Atractylodes, Angelica, and Tangerine Peel Drink) added to Bamboo Sap and Ginger Juice was given. After five or six doses, she recovered.

Commentary: Huo-Huo, Taiyang disease, and Dampness-Toxin all belong to parasite syndromes. In the early stage, symptoms resemble Taiyang disease, sometimes transforming from it. Generally, Taiyang disease causes internal heat, reduced food intake, and empty intestines and stomach, allowing the Three Worms to move and seek food, eroding the Five Zang Organs and the lower body, resulting in worm disease. Signs include dark teeth, white coating covering the tongue, and in severe cases, black lips with sores, heavy limbs, mental confusion, and a preference for sleep. Parasites eroding the anus lead to rotting visible organs, which is fatal. One must frequently examine the upper and lower lips: sores on the upper lip indicate parasites eroding the viscera; sores on the lower lip indicate parasites eroding the anus. This condition kills rapidly and often arises from diarrhea/dysentery. Primary formulas include Taoren Tang (Peach Kernel Decoction), Huanglian Xijiao Tang (Coptis and Rhinoceros Horn Decoction), and Xionghuang Rui San.

Treatment Formulas:
Taoren Tang (Peach Kernel Decoction):
Sheng Ai Ye (Artemisia argyi Herb), Taoren (Peach Seed Kernel, peeled, de-husked, fried, double-kernels avoided), Huaizuizi (Styphnolobium Seed, crushed, each 1 liang), Dazao (Jujube Fruit, 15 pieces, pitted). Decoct these in 2 jin of water until 1.5 jin remains, divide into three doses.

Huanglian Xijiao Tang (Coptis and Rhinoceros Horn Decoction): Treats cases where toxins emerge from the lower part after Taiyang disease or other illnesses.
Huanglian (Coptis Rhizome, 0.5 liang), Xijiao (Rhinoceros Horn, 1 liang), Wumei (Mume Fruit, 7 pieces), Moyao (Myrrh, 2.5 qian). Decoct these in 2.5 large jin of water until 1.5 jin remains, divide into three doses.

Xionghuang Wan (Realgar Pill): Treats Taiyang disease and Huo-Huo with slight irritability, silence, desire to lie down, toxic qi attacking upward causing dry throat and hoarseness, lower erosion with dampness, or pus/blood in stool.
Xionghuang (Realgar, ground), Danggui (Angelica Sinensis Root, fried, each 7.5 qian), Lushen (Aloe, ground), Shexiang (Musk, ground, each 2.5 qian), Binglang (Areca Seed, 0.5 liang). Pound and grind into powder, make pills with wheat paste size of tung tree seeds. Take 10-15 pills before meals with warm porridge drink, three times daily.

Xionghuang Rui San (Realgar Acute Powder): Treats lower body worm sores.
Xionghuang (Realgar), Kushen (Sophora Root), Qingxiangzi (Celosia Seed), Huanglian (Coptis Rhizome, each 0.5 liang), Taoren (Peach Seed Kernel, peeled, de-husked, 2.5 qian). Grind into powder. Mix with juice from fresh Artemisia argyi leaves to form pills the size of a jujube pit. Wrap in cotton and insert into the lower orifice. Bamboo leaf juice is better for mixing. In winter without mugwort, using the powder wrapped for insertion is also acceptable.