热结旁流，协热下利，大便闭结，大肠胶闭，总之邪在里，其证不同者，在乎通
塞之间耳。
协热下利者，其人大便素不调，邪气忽乘于胃，便作烦渴，一如平时泄泻稀粪而色不败，其
色但焦黄而已。此伏邪传里，不能稽留于胃，至午后潮热，便作泄泻，子后热退，泄泻亦减
，次日不作潮热，利亦止，为病愈。潮热未除，利不止者，宜小承气汤，以彻其余邪，而利
自止。
利止二三日后，午后忽加烦渴，潮热下泄，仍如前证，此伏邪未尽，复传到胃也，治法同前
。
大便闭结者，疫邪传里，内热壅郁，宿粪不行，蒸而为结，渐至更硬，下之结粪一行，瘀热
自除，诸证悉去。
热结旁流者，以胃家实，内热壅闭，先大便闭结，续得下利纯臭水，全然无粪，日三四度，
或十数度，宜大承气汤，得结粪而利立止。服汤不得结粪，仍下利并臭水及所进汤药，因大肠
邪胜，失其传送之职，知邪犹在也，病必不减，宜更下之。
大肠胶闭者，其人平素大便不实，设遇疫邪传里，但蒸作极臭，然如粘胶，至死不结，
但愈蒸愈闭，以致胃气不能下行，疫毒无路而出，不下即死，但得粘胶一去，下证自除，霍然
而愈。
温疫愈后三五日，或数日，反腹痛里急者，非前病原也，此下焦别有伏邪所发，欲作滞下也
。发于气分则为白积；发于血分则为红积；气血俱病，红白相兼。邪尽利止，未止者，宜芍
药汤。（方见前战汗条）
愈后大便数日不行，别无他证，此足三阴不足，以致大肠虚燥，此不可攻，饮食渐加，
津液流通，自能润下也。觉谷道夯闷，宜作蜜煎导，甚则宜六成汤。
病愈后，脉迟细而弱，每至黎明，或夜半后，便作泄泻，此命门真阳不足，宜七成汤。或亦
有杂证属实者，宜大黄丸，下之立愈。
六成汤
当归（一钱五分） 白芍药（一钱） 地黄（五钱） 天门冬（一钱） 肉苁蓉（三钱） 麦门冬（一钱）
照常煎服。日后更燥者，宜六味丸，少减泽泻。
七成汤
破故纸（炒锤碎，三钱） 熟附子（一钱） 辽五味（八分） 白茯苓（一钱） 人参（一钱） 甘草（炙，五分）
照常煎服。愈后更发者，宜八味丸，倍加附子。
Heat-binding with peripheral flow (Re-jie Pang-liu), heat-collateral diarrhea (Xie-re Xia-li), constipation (Da-bi Bi-jie), and large intestine gel-blockage (Da-chang Jiao-bi), in summary, the pathogenic factor is in the interior. The difference in their manifestations lies merely between patency and obstruction.
Regarding heat-collateral diarrhea: The patient's bowel movements have been irregular for a long time. Suddenly, the pathogenic factor attacks the Stomach, causing irritability and thirst. The symptoms resemble usual diarrhea with loose stools that are not discolored or spoiled, but rather appear scorched yellow. This indicates latent pathogenic factors transmitting to the interior; unable to remain in the Stomach, they cause tidal fever in the afternoon, leading to diarrhea. After midnight (Zi hour), the fever subsides, and the diarrhea also decreases. If there is no tidal fever the next day and the diarrhea stops, the disease is cured. If tidal fever persists and diarrhea does not stop, Xiao Cheng Qi Tang (Minor Order the Yang Decoction) should be used to eliminate residual pathogens, after which the diarrhea will cease naturally.
Two or three days after the diarrhea stops, if irritability, thirst, tidal fever, and diarrhea suddenly recur in the afternoon, resembling the previous condition, it is because the latent pathogens are not fully cleared and have transmitted back to the Stomach. The treatment method is the same as before.
Regarding constipation: When epidemic pathogens transmit to the interior, internal heat becomes stagnant and郁 (depressed). Retained feces fail to descend, are steamed by heat into hardened masses, and gradually become harder. Once purgation causes the hardened feces to pass, the stasis-heat is removed, and all symptoms disappear.
Regarding heat-binding with peripheral flow: Due to excess heat in the Stomach and Intestines (Wei Jia Shi) and internal heat stagnation, the patient initially experiences constipation, followed by diarrhea of pure foul-smelling water without any fecal matter, occurring three to four times or even more than ten times a day. Da Cheng Qi Tang (Major Order the Yang Decoction) is appropriate. Once the hardened feces are passed, the diarrhea stops immediately. If, after taking the decoction, no hardened feces are passed, and the patient continues to excrete foul water along with the ingested medicine, it indicates that the Large Intestine is overwhelmed by pathogens and has lost its function of transportation and transformation. Knowing that the pathogen remains, the illness will not improve. Another purgative treatment is indicated.
Regarding large intestine gel-blockage: The patient usually has loose stools. Upon transmission of epidemic pathogens to the interior, the stool steams into extremely foul-smelling mucus resembling glue. It does not harden until death but becomes increasingly obstructed due to steaming. This prevents Stomach Qi from descending, trapping epidemic toxins with no exit. Without purgation, death ensues. Once the mucus is expelled, the lower excess symptoms resolve, and the patient recovers abruptly.
Three to five days or several days after recovery from warm epidemic, if abdominal pain and tenesmus (Li Ji) occur, this is not the original disease but rather latent pathogens in the Lower Jiao manifesting as dysentery (Zhi Xia). Manifesting in the Qi level results in white dysentery; manifesting in the Blood level results in red dysentery; if both Qi and Blood are affected, red and white mix. When pathogens are exhausted, diarrhea stops. If it does not stop, Shao Yao Tang (Peony Decoction) is indicated. (Formula see previous section on Battle Sweat).
Several days after recovery, if bowel movements do not occur but there are no other symptoms, this is due to insufficiency of the Three Yin Meridians of the Foot, causing deficiency-dryness in the Large Intestine. Purging is contraindicated here. As diet increases and body fluids circulate, natural lubrication and passage will occur. If there is a sensation of blockage and stuffiness at the anus, Honey Suppositories (Mi Jian Dao) should be made for local application. In severe cases, Liu Cheng Tang (Six Parts Decoction) is indicated.
After recovery, if the pulse is slow, fine, and weak, and diarrhea occurs every dawn or after midnight, this indicates insufficiency of True Yang in the Ming Men (Gate of Life). Qi Cheng Tang (Seven Parts Decoction) is indicated. There may also be mixed conditions belonging to excess patterns, for which Da Huang Wan (Rhubarb Pill) is indicated; purging will lead to immediate recovery.
Liu Cheng Tang (Six Parts Decoction)
Dang Gui (Angelicae Sinensis Radix, 1.5 qian) Bai Shao Yao (Paeoniae Radix Alba, 1 qian) Di Huang (Rehmanniae Radix, 5 qian) Tian Men Dong (Asparagi Radix, 1 qian) Rou Cong Rong (Cistanches Herba, 3 qian) Mai Men Dong (Ophiopogonis Radix, 1 qian)
Prepare and administer as usual. If dryness worsens later, Liu Wei Wan (Six-Ingredient Pill with Rehmannia) is indicated, with a slight reduction in Ze Xie (Alismatis Rhizoma).
Qi Cheng Tang (Seven Parts Decoction)
Po Gu Zhi (Cibotii Rhizoma, stir-fried and crushed, 3 qian) Shu Fu Zi (Aconiti Lateralis Radix Praeparata, 1 qian) Liao Wu Wei (Schisandrae Chinensis Fructus, 0.8 fen) Bai Fu Ling (Poria, 1 qian) Ren Shen (Ginseng Radix et Rhizoma, 1 qian) Gan Cao (Glycyrrhizae Radix et Rhizoma, honey-fried, 0.5 fen)
Prepare and administer as usual. If symptoms recur after recovery, Ba Wei Wan (Eight-Ingredient Pill) is indicated, with doubled Fu Zi (Aconiti Lateralis Radix Praeparata).