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Intestinal and Large Intestine Abscesses are caused by Damp-Heat, with Qi stagnation and Blood stasis pouring into the intestines. In the initial stage, Da Huang Tang (Rhubarb Decoction) is taken to move blood stasis; once pus has formed, Yi Yi Mu Dan Fang (Coix and Moutan Formula, referring to Yi Yi Fu Zi San or Yi Yi Tang) is used to calm the condition.

[Note] These two conditions are both formed by the coagulation of Damp-Heat and Qi stagnation. It may be due to effort-induced blood stasis, or postpartum retained blood accumulating and flowing into the Large Intestine and Small Intestine. Initially, there is fever, aversion to wind, spontaneous sweating, and skin rough like scales. There is dull pain and slight swelling at Guan Yuan (CV4, Conception Vessel 4) and Tian Shu (ST25, Stomach 25) acupoints; pressing causes acute abdominal pain. Large Intestine abscesses often present with a sensation of heaviness in defecation, while Small Intestine abscesses often present with difficult and obstructed urination. The pulse is consistently slow and tight. At this time, the abscess pus has not yet formed, and it is appropriate to purge using Da Huang Tang (Rhubarb Decoction); if after the blood stasis is cleared, urination remains obstructed, it is still appropriate to add Su Po (Amber) powder and Mu Tong (Akebia Decoction) to Da Huang Tang to promote diuresis, which will be effective. If the abscess has formed for a long time without ulcerating, the body skin is rough like scales, there is no accumulation inside, the abdomen is tense and painful, the body has no fever but the pulse is rapid, this indicates cold-Yin in the intestines that cannot transform into pus, and Yi Yi Fu Zi San (Coix and Aconite Powder) is indicated; if the pulse is surging and rapid, the umbilicus protrudes, there is abdominal pain, distension, fullness, and inability to eat, and there is a sound of water when turning or changing position, along with dribbling and stabbing pain during urination, the abscess pus has formed, and Yi Yi Tang (Coix Decoction) is indicated; if the abdomen is soft and painful, the lower abdomen is tense and distended, and pus is discharged frequently, the pathogenic toxin has not been resolved, and Dan Pi Tang (Moutan Decoction) is indicated; if pus flows from the umbilicus, abdominal distension persists, food intake decreases, the complexion is pale, and spirit is fatigued, this belongs to deficiency of both Qi and Blood, and Ba Zhen Tang (Eight Treasure Decoction) added with Mu Dan Pi (Moutan Cortex), Rou Gui (Cinnamon Bark), Huang Qi (Astragalus Root), and Wu Wei Zi (Schisandra Fruit) is indicated to astringe and tonify. When patients turn their bodies or move, they should do so slowly and without startling, exercising caution. If delayed for a long time, neglecting treatment leads to the toxin attacking the Five Zang and Six Fu organs, abdominal pain radiating to the Yin region, damaging the stomach and intestines, potentially causing the external genitalia to turn purple-black and rot, with a deteriorated complexion, lack of pus, frequent discharge of turbid water, foul odor on bedding, incessant irritability, fever, and dry throat, all of which are adverse signs (difficult-to-treat conditions).

Guan Yuan (CV4, Conception Vessel 4) is also known as the Front-Mu point of the Small Intestine, located three cun below the umbilicus. Tian Shu (ST25, Stomach 25) is also known as the Front-Mu point of the Large Intestine, located two cun lateral to the umbilicus.

Da Huang Tang (Rhubarb Decoction)
Da Huang (Rhei Radix et Rhizoma, crushed and stir-fried) Mu Dan Pi (Moutan Cortex) Xiao Shi (Natrii Sulfas, ground) Jie Zi (Sinapis Semen) Tao Ren (Persicae Semen, stir-fried, soaked in water first to remove skin and tips, double-kernel seeds should not be used)
All in equal proportions, finely crushed. Use five qian each time, add two zhong of water, decoct to one zhong, remove dregs, and take warm on an empty stomach. Continue until pus and blood are purged; if not purged, take again.

[Formula Song] Da Huang Tang excellently treats intestinal abscess, hard pain in the lower abdomen before pus forms; stir-fried Moutan Cortex and Rhubarb, mustard seed, peach kernel, and niter are efficacious.

Yi Yi Fu Zi San (Coix and Aconite Powder)
Fu Zi (Prepared Aconiti Lateralis Radix, two fen) Bai Jiang Cao (Patriniae Herba, five fen) Yi Yi Ren (Coicis Semen, stir-fried, one qian)
Grind into powder. Take one fang cun bi each time, decoct with two he of water, and take in one dose. Urination should follow. *San Yin Fang* states: Coix Seed and Aconite are as above; Patriniae Herba uses one liang and one fen. Take four qian with one and a half cups of water, decoct to seven parts, remove dregs, and take on an empty stomach.

[Formula Song] Yi Yi Fu Zi San for scaly skin, intestinal abscess with abdominal distension, pain, and rapid pulse; Aconite, Patriniae Herba, and Coix Seed, ground and decocted in water, taken on an empty stomach.

Yi Yi Tang (Coix Decoction)
Yi Yi Ren (Coicis Semen) Gua Lou Ren (Trichosanthis Semen, three qian each) Mu Dan Pi (Moutan Cortex) Tao Ren (Persicae Semen, pounded into paste, two qian each)
Add two zhong of water, decoct to one zhong, take at any time.

[Formula Song] Yi Yi Tang treats abdominal water sounds, intestinal abscess with dribbling urine and stabbing pain; Moutan Cortex together with Trichosanthis Seed, along with Peach Kernel and Coix Seed.

Dan Pi Tang (Moutan Decoction)
Dan Pi (Moutan Cortex) Gua Lou Ren (Trichosanthis Semen, one qian each) Tao Ren (Persicae Semen, pounded into paste) Pu Xiao (Natrii Sulfas, two qian each) Da Huang (Rhei Radix et Rhizoma, five qian)
Add two zhong of water, decoct to one zhong, remove dregs, add Niter, boil a few more times, and take at any time.

[Formula Song] Dan Pi Tang treats intestinal abscess syndrome, soft abdomen with pain and frequent pus discharge; Niter, Rhubarb, Moutan, Trichosanthis, and Peach Kernel together, decocted in water for miraculous efficacy.

Ba Zhen Tang (Eight Treasure Decoction) (See Ulcer Section)