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The patient presents with fever, headache, body ache, aversion to cold, accompanied by vomiting and diarrhea. This condition is named Huoluan (Colic Disorder, characterized by sudden severe vomiting and diarrhea). If the heat syndrome is predominant and there is a desire to drink water, Wuling San (Five-Ingredient Poria Pill) is the primary treatment. If the cold syndrome is predominant and there is no desire for water, Lizhong Wan (Regulate the Middle Pill) is the primary treatment.

Lizhong Wan (Regulate the Middle Pill):
Renshen (Ginseng Radix), Gancao (Licorice Root), Baizhu (Atractylodis Macrocephalae Rhizoma), Ganjiang (Dried Ginger).
Crush and sieve into powder, mix with honey to form pills, each the size of a chicken egg yolk. Take several he of boiling water, dissolve one pill by grinding it in the water, and take warm. Administer three or four times during the day and twice at night. If warmth is not felt in the abdomen, increase the dosage to three or four pills. However, this method is inferior to the decoction. For the decoction: use eight sheng of water, boil down to three sheng, remove the dregs, and take one sheng warm, three times a day.

If there is a throbbing sensation above the umbilicus, it indicates movement of Kidney Qi; remove Baizhu and add Guizhi (Cinnamon Twig). If vomiting is excessive, remove Baizhu and add Shengjiang (Fresh Ginger), three liang. If diarrhea is severe, continue using Baizhu. If palpitations occur, add Fuling (Poria). If abdominal pain occurs due to deficiency, add Renshen. If abdominal fullness occurs, remove Baizhu and add Fuzi (Aconite Lateralis Radix Preparata), one piece.

In Shaoyin Disease (Lesser Yin Disease), after two to three days up to four to five days, if abdominal pain, difficulty in urination, persistent diarrhea, and passage of pus and blood in stool occur, Taohua Tang (Peach Blossom Decoction) is indicated.
This syndrome differs from Zhenwu Tang Syndrome. The latter presents with heaviness and pain in the four limbs, indicating the presence of Water Qi (fluid retention); this syndrome involves pus and blood in stool, indicating the presence of Fire Qi (heat pathogen). Why clear the fire instead of using warming tonification?
Because treating Water Qi in the Lower Jiao (Lower Burner) differs from treating Water Qi in the Heart/Stomach region; treating pus and blood in stool in the Lower Jiao also requires different methods compared to pain in the epigastrium or vexation in the heart. The Heart belongs to Li (Fire), with True Water residing within it; the treatment should follow its tendency to moisten and descend, thus using bitter-cold herbs to drain it. Kan (Water) belongs to Water, with True Fire residing within it; the treatment should follow its nature to flare upward, thus using bitter-warm herbs to disperse it. When Fire is depressed in the lower part, it overacts on Geng Metal (Lung/Large Intestine); when Fire flares upward, it generates Wu Earth (Spleen/Stomach). The principle of the Five Elements is that what is coming advances, and what is going recedes. When Earth receives its command, Fire retreats to its position; when Water returns to its function, abdominal pain is removed, pus and blood are cleared, and urination becomes smooth. Therefore, this formula does not clear fire or promote diuresis, but solely focuses on cultivating Earth (Spleen/Stomach). It relies entirely on Ganjiang's rotating action, along with Chishizhi (Halloysitum Rubrum) and Jingmi (Oryza Sativa Germen) to achieve consolidation and harmony. It is named "Taohua" (Peach Blossom) to symbolize the harmonious nature of Spring, not merely because of its color.

Taohua Tang (Peach Blossom Decoction):
Chishizhi (Halloysitum Rubrum), one jin (half used whole, half sifted into powder); Ganjiang (Dried Ginger), one liang; Jingmi (Oryza Sativa Germen), one sheng.
Chishizhi is astringent to secure collapse and stop leakage, red in color to harmonize blood, sweet and sour in taste. Sweetness tonifies Original Qi, sourness restrains rebellious Qi, and pungency disperses pathogenic Qi; thus, it serves as the Sovereign herb. Half is used in chunks and half in powder, so that the clear aspect within the turbid enters the Heart and nourishes the Ying (Nutritive) level, while the turbid aspect enters the intestines to stop diarrhea. Fire has the nature of flaming upward, and fire expands when empty. With Chishizhi's intestinal astringency, it can facilitate this upward-flaring nature. Flaming upward corresponds to the bitter flavor; assisted by the bitter-warm nature of Ganjiang, it follows the transformation of Fire, dispersing depressed Fire. If Fire is hyperactive, it fails to generate Earth; the Minister herb, Jingmi with its sweetness, allows Fire to have a source of generation, thereby forming useful Fire. When Fire within Earth is unobstructed, the Fire entity within Water assumes its proper position; sunken Yang ascends, erratic Yin Blood returns to its origin, Fire rises naturally, and Water descends naturally.

Shaoyin Disease with abdominal pain and diarrhea indicates deficiency of Yang in Kan (Kidney). Thus, Zhenwu Tang uses Fuzi, while Taohua Tang uses Ganjiang; one should not treat difficulty in urination as a heat syndrome. Zhenwu Tang employs the method of guiding Fire back to its source, whereas Taohua Tang employs the method of raising Yang and scattering Fire.

If Kan Yang is excessive, it can manifest as fever on the exterior of the body, as seen in Mahuang Fuzi Tang Syndrome. If Kan Yang is not deficient, it can still cause fever in the Upper Jiao within the body, such as dry mouth, dry tongue, sore throat, vexation, chest fullness, and heart pain. If Kan Yang is insufficient, it cannot generate heat in the Yang portion above the waist, but only manifests heat in the Yin portion below the waist, such as difficulty in urination and diarrhea with pus and blood. This is latent Yang, a suppressed fire, which differs from general rising-Yang fire.

In Shaoyin Disease, cases with pus and blood in stool may be treated with acupuncture.
Passage of pus and blood in stool is also caused by Heat entering the Blood Chamber; puncture Qimen (LR14) to drain the pathogen. Although the disease is in Shaoyin, puncturing Jueyin (Liver Meridian) applies the principle of "draining the son" in excess conditions.