小肠在脐之左，关元穴属小肠。患痈则左腿不能伸。大肠在
脐之右，天枢穴属大肠。患痈则右腿不能伸。部位虽分，为病相似，治亦略同，故《金匮》、《千金》概名肠
痈也。其症小腹痞肿，按之痛，小便数似淋，发热，时自汗出，复恶寒，身皮甲错，腹皮急如肿状，脉迟紧
者脓未成，可下之，桃仁承气汤。脉洪数者脓已成，大黄牡丹汤。脓从疮出，或有出脐者，惟大便下脓血者
自愈。按小便数似淋，或小便出脓血者，为小肠痈。大便出脓血者，为大肠痈。脓从脐中出者，为盘肠痈，
多不治。此症总因湿毒瘀血，结滞肠内而成。其始发热恶寒，小腹满痛，反侧不便，或腿缩难伸，即肠痈确候。
其腹皮急，按之濡，不烦渴者，属阴寒。牡丹散、内托十宣散。其小腹痞坚，按之痛而烦热者，属结热。
大黄牡丹汤。或脉迟紧，则脓尚未成，急解毒，通肠饮，或大黄煎。若脉滑数，则脓已成，宜排脓，太乙膏、
排脓散。如脉洪数，小腹胀痛，不食溺涩，为脓壅滞，宜疏通，薏苡仁汤排之。有瘀血，小腹硬痛，四物延
胡汤。若腹濡痛，时下脓，由元气虚，宜排脓药中兼补益，丹皮散。或溃后痛甚，淋脓不止，由气血大亏，须
峻补，参 地黄汤。凡患肠痈者不可惊，惊则肠断而死。坐卧转侧宜徐缓，饮食不宜过饱，庶可保生。
小肠位于肚脐左侧，关元穴归属于小肠。若患痈肿，则左腿无法伸直。大肠位于肚脐右侧，天枢穴归属于大肠。若患痈肿，则右腿无法伸直。虽然病位不同，但病症相似，治疗方法也大致相同，因此《金匮要略》和《千金方》统称为肠痈（肠道化脓性疾病）。其症状表现为小腹痞块肿胀，按压时疼痛，小便频数类似淋证，发热，时常自汗出，随后又出现恶寒，皮肤干枯如鳞甲交错，腹部皮肤紧绷如同肿胀之状。若脉象迟而紧，说明脓液尚未形成，可采用攻下法，使用桃仁承气汤（Peach Kernel and Rheum Decoction）。若脉象洪大而数，说明脓液已经形成，使用大黄牡丹汤（Rhubarb and Cornus Decoction）。脓液从疮口排出，有的从脐部排出，只有大便排出脓血者才能自愈。
按：小便频数类似淋证，或小便排出脓血者，为小肠痈。大便排出脓血者，为大肠痈。脓液从脐中流出者，为盘肠痈（一种严重的肠痈），大多难以治愈。此症总因湿毒与瘀血结滞于肠道内而成。起初出现发热、恶寒，小腹胀满疼痛，翻身困难，或腿部收缩难以伸直，这是肠痈的确切征候。若腹部皮肤紧绷，按压柔软，且不烦躁口渴，属于阴寒证，可用牡丹散（Peony Powder）、内托十宣散（Internal Support Ten-Acupoint Powder）。若小腹痞块坚硬，按压疼痛且伴有烦热，属于结热证，用大黄牡丹汤。若脉象迟而紧，则脓液尚未形成，急需解毒，可用通肠饮（Intestine-Unblocking Decoction）或大黄煎（Rhubarb Decoction）。若脉象滑而数，则脓液已形成，宜排脓，可用太乙膏（Taiyi Plaster）、排脓散（Pus-Expelling Powder）。若脉象洪大且数，小腹胀痛，食欲不振，小便涩滞，为脓液壅滞，宜疏通，用薏苡仁汤（Coix Seed Decoction）以排脓。若有瘀血，小腹硬痛，用四物延胡汤（Tetradecoction with Corydalis）。若腹部柔软疼痛，时下脓液，由元气虚弱所致，宜在排脓药中兼用补益药，用丹皮散（Moutan Powder）。若溃破后疼痛剧烈，流脓不止，由气血严重亏损所致，须峻补，用人参地黄汤（Ginseng and Rehmannia Decoction）。凡患肠痈者不可惊恐，惊恐会导致肠断而死。坐卧转侧动作宜缓慢，饮食不宜过饱，这样才可以保全生命。
The small intestine is located to the left of the umbilicus, and the Guanyuan (CV 4) acupoint belongs to the small intestine. If an abscess occurs, the left leg cannot be extended. The large intestine is located to the right of the umbilicus, and the Tianshu (ST 25) acupoint belongs to the large intestine. If an abscess occurs, the right leg cannot be extended. Although the locations differ, the diseases are similar, and the treatments are roughly the same; therefore, *Jin Gui Yao Lue* (Essential Prescriptions of the Golden Cabinet) and *Qian Jin Fang* (Prescriptions Worth a Thousand Gold) generally refer to it as Chang Yong (Intestinal Abscess). Its symptoms include distension and swelling in the lower abdomen, pain upon pressure, frequent urination resembling Lin syndrome (strangury), fever, spontaneous sweating at times, followed by aversion to cold, rough skin resembling scales, and abdominal skin that is tight as if swollen. If the pulse is slow and tight, the pus has not yet formed, and purgation can be applied using Taoren Chengqi Tang (Peach Kernel and Rheum Decoction). If the pulse is surging and rapid, the pus has already formed, and Dahuang Mudan Tang (Rhubarb and Moutan Decoction) is used. Pus discharging from the wound, or sometimes from the umbilicus, indicates recovery only when pus and blood are passed via stool.
Note: Frequent urination resembling strangury, or urination containing pus and blood, indicates Small Intestine Abscess. Passing pus and blood via stool indicates Large Intestine Abscess. Pus discharging from the umbilicus indicates Pan Chang Yong (Coiled Intestine Abscess), which is mostly incurable. This condition is generally caused by damp-toxin and stasis binding within the intestines. Initially, fever and aversion to cold, lower abdominal fullness and pain, difficulty turning over, or retracted legs difficult to extend, are definitive signs of intestinal abscess. If the abdominal skin is tight but soft upon pressure, without irritability or thirst, it belongs to Yin-Cold pattern, treated with Mudan San (Peony Powder) or Ne Tuo Shi Xuan San (Internal Support Ten-Acupoint Powder). If the lower abdomen is distended and hard, painful upon pressure, accompanied by irritability and heat, it belongs to Accumulated Heat pattern, treated with Dahuang Mudan Tang. If the pulse is slow and tight, pus has not yet formed; urgently resolve toxicity and unblock the intestines using Tong Chang Yin (Intestine-Unblocking Decoction) or Dahuang Jian (Rhubarb Decoction). If the pulse is slippery and rapid, pus has formed; promote pus discharge using Tai Yi Gao (Taiyi Plaster) or Pai Nong San (Pus-Expelling Powder). If the pulse is surging and rapid, with lower abdominal distension and pain, poor appetite, and dysuria, it indicates pus obstruction; promote unblocking using Yiyi Ren Tang (Coix Seed Decoction) to expel pus. If there is blood stasis with hard and painful lower abdomen, use Siwu Yanhu Tang (Tetradection with Corydalis). If the abdomen is soft and painful with intermittent pus discharge due to Yuan Qi deficiency, combine pus-expelling herbs with tonics, using Danpi San (Moutan Powder). If severe pain persists after ulceration with continuous pus discharge due to severe depletion of Qi and Blood, strong tonification is required using Renshen Dihuang Tang (Ginseng and Rehmannia Decoction). Patients with intestinal abscess must not be frightened; fright may cause intestinal rupture and death. Sitting, lying, turning, and moving should be slow; diet should not be excessive, so as to preserve life.