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Hougan (a ulcerative disease occurring in the throat) initially presents as a Yin deficiency syndrome, characterized by dryness and stabbing pain in the pharynx with a pale red color. This is caused by deficient fire from the Kidney flaring upward and overcoming Lung Metal, leading to symptoms such as throat ulceration, loss of voice, foul odor, and pain.

[Note] This condition is also known as Yin Deficiency Hougan. Initially, there is a sensation of dryness in the pharynx, as if grass thorns are constantly pricking the throat, or as if a hard object is obstructing the swallowing passage. There may be vomiting of sour water and hiccups bringing up sweet saliva. The throat appears pale red, slightly swollen and painful. After a long time, the color becomes dark purple and dull, resembling the color of a frozen pomegranate seed. This is due to the long-term depletion of Kidney fluids, causing Ministerial Fire (Mingmen Fire residing in the Liver and Kidney) to flare upward, consuming Lung Metal, and scorching the throat. Consequently, swelling and pain increase daily, the throat ulcerates and sheds tissue, with rotting flesh accumulating in layers like shrimp skins. The voice becomes hoarse, breathing is rapid and labored with much phlegm, the foul odor spreads, and pain doubles, hindering food intake. As a result, Stomach Qi gradually declines. If irritability occurs due to excessive deficient fire, Zhiku Dihuang Tang (Anemarrhena and Phellodendron Rehmannia Decoction) is suitable; if there is vomiting of sour water and hiccups with saliva, Ganlu Yin (Sweet Dew Decoction) added with Chuan Lian Zi (Coptis Rhizoma) is suitable; for dry stool, Wanshi Runzao Gao (Wan's Moistening Dryness Ointment) should be taken concurrently; for pale face and lips, insomnia, and poor appetite, Guipi Tang (Restore the Spleen Decoction) added with wine-fried Chuan Lian Zi is suitable; for swelling, Zixue San (Purple Snow Powder) should be blown into the throat; for ulceration, Babao Zhenzhu San (Eight-Treasure Pearl Powder) should be blown into the throat. If the syndrome matches the formula, perhaps one or two cases can be cured; otherwise, it is difficult to save.

Wanshi Runzao Gao (Wan's Moistening Dryness Ointment)
Take one jin (approx. 500g) of lard, chop finely, render the oil, and remove dregs; add one jin of refined white honey, stir evenly until solidified. Take two teaspoons each time, three to five times daily.

[Fang Ge - Formula Song] Wanshi Runzao Gao is miraculous, lowering fire, clearing Metal, and moistening dry bowels; rendered lard mixed with white honey, taking it can cure loss of voice.

Babao Zhenzhu San (Eight-Treasure Pearl Powder)
Er Cha (Catechu), Chuan Lian Zi Mo (Powdered Coptis Rhizoma), Chuan Bei Mu (Fritillariae Bulbus, heart removed and powdered), Qing Dai (Indigo Naturalis) (each 1.5 qian); Hong He (burned to ash but retaining nature), Guan Fen (Lead White), Huang Bai Mo (Phellodendri Cortex Powder), Yu Nao Shi (Scomberi Lapillus, lightly calcined), Hu Po Mo (Amber Powder) (each 1 qian); Ren Zhong Bai (Calculus Humanus, calcined, 2 qian); Peng Sha (Borax, 8 fen); Bing Pian (Borneolum Syntheticum, 6 fen); Jing Niu Huang (Bovis Calculus, boiled in tofu for half an incense stick duration, then powdered), Zhen Zhu (Margarita, same preparation, each 5 fen); She Xiang (Moschus, 3 fen).
Grind each ingredient into an extremely fine powder, mix them together, and grind uniformly again. Use a fine brush tube to blow the powder onto the ulcerated areas inside the throat.

[Fang Ge - Formula Song] Babao Zhenzhu treats Hougan ulceration, Borneol, Moschus, Catechu, Coptis, and Fritillaria; Red Ash, Lead White, Indigo, Bovis Calculus, Fish Stone, Human Ash, Phellodendrum, Borax, and Amber.

Zhiku Dihuang Tang (i.e., Liuwei Dihuang Wan [Six-Ingredient Rehmannia Pill] added with Zhi Mu [Anemarrhenae Rhizoma] and Huang Bai [Phellodendri Cortex]. Indicates facial freckles)
Ganlu Yin (See Man Hou Feng [Slow Throat Wind] section)
Guipi Tang (See Ru Bu Ru Zhong He Jie [Lump in Breast] section)