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[Symptoms of Summerheat Diarrhea] During the summer and autumn seasons, sudden abdominal pain occurs, accompanied by mental restlessness, thirst, dry and scorched teeth, acute diarrhea with watery stools, borborygmus (intestinal rumbling) with undigested food in stool (Sunxie), alternating pain and diarrhea. This is a syndrome of summerheat-heat.

[Etiology of Summerheat Diarrhea] When the fire element dominates, the hot qi of heaven descends, and the damp qi of earth ascends. The qi of summerheat and dampness fills the universe. Humans contract the pathogen of excessive heat, damaging the stomach and intestines, thus causing summerheat diarrhea.

[Pulse of Summerheat Diarrhea] A deficient and fine pulse indicates summerheat; a surging and slippery pulse indicates middle-heat; a soggy and scattered pulse indicates summerheat-dampness; a rapid and intermittent pulse indicates stagnant heat.

[Treatment of Summerheat Diarrhea] It is appropriate to clear summerheat and dampness, and separate yin and yang. If the pulse is deficient and fine, use Huoxiang Shanju Decoction (Huo Xiang Shen Ju Jian) taken with Liuyi San (Six-to-One Powder). If the pulse is surging and slippery with severe heat, use Huanglian Xiangru Yin (Coptis and Mosla Drink) taken with Liuyi San. If the heat is mild, use Mutong Tang (Akebia Decoction) taken with Liuyi San. If there is discomfort in the chest region, use Pingwei Liuyi San.
Huoxiang Shanju Decoction: Renshen (Ginseng Root), Juhong (Exocarpium Citri Reticulatae), Huoxiang (Patchouli Herb). Decoct the three ingredients together.
Huanglian Xiangru Yin: Huanglian (Coptis Rhizome), Xiangru (Mosla Herb), Nongpu (Magnolia Bark), Biandou (Lablab Seed), Gancao (Licorice Root).
Pingwei Liuyi San: Cangzhu (Atractylodis Rhizoma), Nongpu (Magnolia Bark), Chenpi (Citri Reticulatae Pericarpium), Gancao (Licorice Root), Huashi (Talcum).

[Symptoms of Middle-Heat Diarrhea] Fever and thirst, dry lips and scorched teeth, flushed face and irritability, dark and scanty or painful urination. Slight distension in the lower abdomen triggers immediate diarrhea, which stops once it begins. After a short while, pain returns followed by diarrhea. The anus feels burning like fire, and the stool color is mostly yellow. This is a diarrhea syndrome caused by fire-heat.

[Etiology of Middle-Heat Diarrhea] Excessive heat prevails, and damp-fire flares and steams. Individuals with accumulated internal heat who contract pathogenic heat will develop middle-heat diarrhea.

[Pulse of Middle-Heat Diarrhea] A floating, large, and rapid pulse indicates heat located in the exterior. If a deep and rapid pulse is seen, heat is located in the interior. A rapid and forceful pulse indicates severe middle-heat; a rapid... [Text cuts off here].

[Treatment of Middle-Heat Diarrhea] If heat is in the exterior, use Chaige Qinlian Tang (Bupleurum and Pueraria Scutellaria Coptis Decoction). If heat is in the interior, use Jiami Zhike Huanglian Tang (Secret Formula Magnolia Bark and Coptis Decoction) or Jiami Mutong Huangqin Tang (Secret Formula Akebia and Scutellaria Decoction)...
Chaige Qinlian Tang: Chaihu (Bupleuri Radix), Gange (Puerariae Radix), Huangqin (Scutellariae Radix), Chuanlian (Coptidis Rhizoma). Decoct the four ingredients together and take orally.
Jiami Zhike Huanglian Tang: Chuanlian (Coptidis Rhizoma), Zhike (Aurantii Fructus Immaturus), Mutong (Akebiae Caulis), Gancao (Licorice Root).
Bazheng San (Eight-Herb Powder): Qumai (Dianthi Herba), Huashi (Talcum), Mutong (Akebiae Caulis), Lvxing (Polygoni Avicularis Herba), Gancao (Licorice Root), Cheqianzi (Plantaginis Semen), Shanzhi (Gardeniae Fructus), Chi Fuling (Poria with Hostwood). Add Dahuang (Rhei Radix et Rhizoma) if purgation is indicated.