张仲景云∶肠痈之证，因饮食积热，或母食辛热之物所致。小腹按之则痛，小
便数似淋，腹急，恶寒，身皮甲错，或自汗恶寒，若脉迟紧，未有脓者，用仙方活
命饮以解其毒。脉洪数，已有脓者，服太乙膏以下其脓。小腹疼痛，小便不利者，
脓壅滞也，牡丹皮散主之。
窃谓、经云∶肠痈为病，不可惊，惊则肠断而死。故坐卧转侧之间，须令徐
缓，时少饮薄粥，及用八珍汤固其元气，静养调理，庶可保也。
大黄汤 治肠痈，小腹坚肿，按之则痛，肉色如常，或 赤微肿，小便频数，汗出
憎寒，脉紧，脓未成也，急服之。
大黄（炒） 朴硝（各一钱） 牡丹皮 栝蒌仁 桃仁（去皮尖，各二钱）
每服二三钱，水煎。
薏苡仁汤 治肠痈腹中痛烦躁不安，或胀满不食，小便涩滞。
薏苡仁 牡丹皮 桃仁（各三两） 栝蒌仁（四两）
上，每服四钱，水煎。
桃仁汤 治肠痈腹中痛，烦躁不安，壅痛，大便闭涩。亦有绕脐生疮者，但用此药
无妨。
桃仁 大黄（炒） 牡丹皮 芒硝 犀角（镑） 冬瓜仁（研。各二钱）
上，水煎，入犀角末服。
牡丹皮散 治肠痈腹濡而痛，时下脓汁，或下血。
牡丹皮 人参 天麻 白茯苓 黄 （炒） 薏苡仁 桃仁 白芷（炒） 当归 川芎
官桂 甘草（各五分） 木香（二分）
上，每服三五钱，水煎。
张仲景说：肠痈（肠道化脓性炎症）这一病证，是由于饮食积滞蕴热，或者母亲食用辛辣温热食物所致。小腹按压时感到疼痛，小便频数类似淋证，腹部拘急，恶寒，皮肤干燥粗糙如鳞甲，或者自汗且恶寒。如果脉象迟而紧，说明尚未成脓，使用仙方活命饮来解毒。如果脉象洪大而数，说明已经成脓，服用太乙膏以排出脓液。如果小腹疼痛且小便不利，这是脓液壅滞的表现，主治用牡丹皮散。
我认为：经典医籍中说：患肠痈病，不可受惊，受惊则会导致肠断而死。所以在坐卧、转身侧身之间，必须动作缓慢，偶尔少量饮用稀薄的粥汤，并使用八珍汤巩固元气，安静休养调理，才可以保全生命。
大黄汤：治疗肠痈，小腹坚硬肿胀，按压则痛，肌肉颜色正常，或者微红微肿，小便频数，出汗且怕冷，脉象紧，脓液尚未形成，需紧急服用此药。
药材组成：大黄（炒制）、朴硝（各一钱）；牡丹皮、栝蒌仁、桃仁（去皮尖，各二钱）。
用法：每次服用二三钱，加水煎煮。
薏苡仁汤：治疗肠痈腹中疼痛烦躁不安，或者胀满不能进食，小便涩滞不畅。
药材组成：薏苡仁、牡丹皮、桃仁（各三两）；栝蒌仁（四两）。
用法：以上药材，每次服用四钱，加水煎煮。
桃仁汤：治疗肠痈腹中疼痛，烦躁不安，气机壅滞疼痛，大便闭塞不通。也有脐周生疮的情况，只要使用此药无妨。
药材组成：桃仁、大黄（炒制）、牡丹皮、芒硝、犀角（镑片）、冬瓜仁（研碎，各二钱）。
用法：以上药材，加水煎煮，加入犀角末服用。
牡丹皮散：治疗肠痈腹部柔软但疼痛，时下脓汁，或者下血。
药材组成：牡丹皮、人参、天麻、白茯苓、黄（炒制）、薏苡仁、桃仁、白芷（炒制）、当归、川芎、官桂、甘草（各五分）；木香（二分）。
用法：以上药材，每次服用三五钱，加水煎煮。
Zhang Zhongjing stated: The syndrome of Changyong (intestinal abscess) arises from dietary accumulation and heat, or from the mother consuming pungent and hot substances. There is pain upon pressing the lower abdomen, frequent urination resembling Lin syndrome (strangury), abdominal urgency, aversion to cold, and skin that is dry and scaly like fish scales, or spontaneous sweating with aversion to cold. If the pulse is slow and tight, indicating that pus has not yet formed, Xianfang Huoming Yin (Immortal Life Elixir Decoction) should be used to resolve toxicity. If the pulse is surging and rapid, indicating that pus has already formed, Taiyi Gao (Great One Plaster) should be taken to drain the pus. If there is lower abdominal pain and difficulty in urination, this indicates stagnation of pus, which is primarily treated with Mudanpi San (Moutan Cortex Powder).
I hold that: The classics state: In cases of Changyong (intestinal abscess), one must avoid fright; if frightened, the intestines may rupture leading to death. Therefore, during sitting, lying down, turning, or shifting positions, movements must be slow and gentle. Occasionally drink thin congee, and use Bazhen Tang (Eight Treasure Decoction) to consolidate Yuanqi (primordial qi). Through quiet rest and regulation, life can be preserved.
Dahuang Tang (Rhubarb Decoction): Treats Changyong (intestinal abscess) characterized by hardness and swelling of the lower abdomen, pain upon pressure, normal muscle color or slight redness and swelling, frequent urination, sweating with aversion to cold, and a tight pulse, indicating that pus has not yet formed. It should be taken urgently.
Ingredients: Dahuang (Rhei Radix et Rhizoma, stir-fried), Puxiao (Natrii Sulfas, each 1 qian); Mudanpi (Moutan Cortex), Gualou Ren (Trichosanthis Semen), Tao Ren (Persicae Semen, peeled and removed of kernels, each 2 qian).
Usage: Take 2-3 qian per dose, decoct in water.
Yiyiren Tang (Coix Seed Decoction): Treats Changyong (intestinal abscess) with abdominal pain, restlessness, or distension and anorexia, and obstructed urination.
Ingredients: Yiyiren (Coicis Semen), Mudanpi (Moutan Cortex), Tao Ren (Persicae Semen, each 3 liang); Gualou Ren (Trichosanthis Semen, 4 liang).
Usage: For the above ingredients, take 4 qian per dose, decoct in water.
Tao Ren Decoction: Treats Changyong (intestinal abscess) with abdominal pain, restlessness, stagnation pain, and constipation. In cases where sores appear around the umbilicus, using this medicine is also safe.
Ingredients: Tao Ren (Persicae Semen), Dahuang (Rhei Radix et Rhizoma, stir-fried), Mudanpi (Moutan Cortex), Mangxiao (Natrii Sulfas), Xijiao (Rhinocerotis Cornu, sliced), Dongguaren (Benincasae Semen, crushed, each 2 qian).
Usage: Decoct the above ingredients in water, and take with powdered Xijiao (Rhinocerotis Cornu).
Mudanpi San (Moutan Cortex Powder): Treats Changyong (intestinal abscess) with a soft but painful abdomen, discharge of pus or blood.
Ingredients: Mudanpi (Moutan Cortex), Renshen (Ginseng Radix et Rhizoma), Tianma (Gastrodiae Rhizoma), Baifuling (Poria, stir-fried), Huangqi (Astragali Radix, stir-fried), Yiyiren (Coicis Semen), Tao Ren (Persicae Semen), Baizhi (Angelicae Dahuricae Radix, stir-fried), Danggui (Angelicae Sinensis Radix), Chuanxiong (Chuanxiong Rhizoma), Guigui (Cinnamomi Ramulus), Gancao (Glycyrrhizae Radix et Rhizoma, each 5 fen); Muxiang (Aucklandiae Radix, 2 fen).
Usage: For the above ingredients, take 3-5 qian per dose, decoct in water.