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Heat pain is characterized by the obstruction and reddish color of both urination and defecation, with a preference for cold and aversion to heat. The Classics state: "When heat remains in the small intestine, it causes pain in the intestines; if excessive heat scorches and causes thirst, the stool becomes hard and dry and cannot be expelled, thus causing pain and obstruction." Treatment should involve cooling and purging methods; do not rush to tonify.

*Zhou Hou Bei Ji Fang* (Emergency Prescriptions Kept Up My Sleeve) formula for sudden abdominal pain:
Dig a small pit in the earth, fill it with water, stir to extract the juice, and drink it to cure the condition.

*Tong Zhi* Qing Zhong Tang (Clear the Middle Decoction):
Coptidis Rhizoma (Huanglian), Gardeniae Fructus (Shanzhi, stir-fried, 2 qian each); Tangerine Peel (Chenpi), Poria (Fuling, 1.5 qian each); Pinelliae Tuber (Banxia, 1 qian, processed seven times with ginger juice); Alpiniae Katsumadai Semen (Caodoukou Ren, crushed and ground); Glycyrrhizae Radix et Rhizoma (Gancao, roasted, 0.7 qian each).
Decoct two cups of water with three slices of ginger until reduced to 0.8 cup; take before meals.

Cold-Heat Pain refers to what the Classics describe as: "When cold qi lodges in the meridians and struggles with heat qi, the vessels become full; when full, there is pain that cannot be pressed." If cold qi lingers and heat qi rises from above, the vessels become distended and large, and blood and qi become chaotic, resulting in severe pain that cannot be pressed. Treatment should harmonize both cold and heat.

Another Formula:
Alpiniae Katsumadai Semen (Caodoukou, 0.7 qian), Stir-fried Gardeniae Fructus (Shanzhi, 2 qian).
Grind these two ingredients into powder, mix with ginger juice and congee to form pills, and take orally.

Kuluan Wan (Melia Toosendan Pill): Treats Ben Tun (Rushing Pig) syndrome with lower abdominal pain.
Take the aforementioned three ingredients, boil in two sheng of wine until the wine is exhausted, dry by baking, and grind into fine powder. For every one liang of this powder, add half a liang of Corydalis Rhizoma (Yanhusuo), eighteen fried Scorpio (Quanxie), and eighteen grains of Syzygium Aromaticum (Dingxiang); grind separately into powder and mix evenly. Make pills the size of wutong seeds using wine paste. Take fifty pills with warm wine on an empty stomach.

Wind Pain is caused by pathogenic wind invading the intestines and stomach internally, struggling with healthy qi to cause pain. Symptoms include aversion to wind and a wiry pulse, with rushing sounds in the abdomen and urgent pain. Zhang Zhongjing stated: "When the yang pulse is choppy and the yin pulse is wiry, according to the method, there should be urgent abdominal pain; first administer Xiao Jian Zhong Tang. If not cured, administer Xiao Chai Hu Tang."

Xiao Chai Hu Tang (Minor Bupleurum Decoction):
Bupleuri Radix (Chaihu), Scutellariae Radix (Huangqin), Pinelliae Tuber (Banxia), Roasted Glycyrrhizae Radix et Rhizoma (Gancao), Ginseng Radix (Renshen), Dried Ginger (Ganjiang), Jujubae Fructus (Dazao).
Decoct in water and take orally.
Note: This formula should follow Zhang Zhongjing's modification rules; for abdominal pain, remove Scutellariae Radix and add Paeoniae Radix Alba (Shaoyao).

He Ji Ju Fang* Chou Dao San (Drawing Knife Powder):
Chuan Bai Jiang (Sichuan White Ginger, 5 liang, chopped and stir-fried together with one qian and one zi of Crotonis Fructus (Badou) meat until the beans turn black, then discard the beans); Galangal Rhizome (Liangjiang, 5 liang, stir-fried together with twenty-five Mylabris (Banmao) until they turn black, then discard the insects); Acori Tatarinowii Rhizoma (Shichangpu, 5.5 liang, not stir-fried); Glucinis Semen (Nuomi, 6 liang and one qian, stir-fried until yellow).
Grind all ingredients into powder. Take two qian per dose, mixed with warm wine on an empty stomach.

*Renzhi Zhizhi Fang* records: A farmer lay exposed under the stars after a heavy meal and drunkenness to cool off, sleeping until dawn. Since then, he suffered from stabbing spleen pain, and all medicines failed.
After several years of lingering illness, he met a wise person who taught him Chou Dao San. After a few doses, he was instantly cured. This shows that the root of wind and dew pathogens lies in the spleen and stomach; Galangal Rhizome and Acori Tatarinowii Rhizoma can disperse the pathogen, while Crotonis Fructus and Mylabris leverage their qi to eradicate the root. Observing this case allows one to understand the principle through analogy. However, since the pain has not recurred, should one not continue with formulas to nourish the spleen for regulation? Treating disease is like washing clothes; one must remove the dirt before applying starch. Medicine relies on mental comprehension; I borrow this metaphor to illustrate.