When the belly reacts to emotions

A belly that tightens as soon as pressure builds, bowel habits that turn unpredictable when nerves are on edge, an erratic appetite, digestion that goes off balance at the slightest upset… In TCM, these signs may be associated with a disharmony between the Liver and the Spleen: the weakened Spleen can no longer hold its ground, and the tense Liver takes the opportunity to encroach on the centre. Tradition sums it up in one image: when Earth is empty, Wood takes advantage (土虚木乘).

This four-herb formula long circulated without a name. The oldest text, linked to the Dan Xi Xin Fa (《丹溪心法》), the collected teachings of Zhu Danxi (朱丹溪), gives only its ingredients; it is the Gu Jin Yi Tong Da Quan (《古今医统大全》) that calls it Bai Zhu Shao Yao San, the “Atractylodes and Peony Powder”. In 1584, Wu Kun (吴昆) set out its mechanism in the Yi Fang Kao (《医方考》): an empty Spleen, an excess Liver.

Firming the Earth, softening the Wood

Commentators sum up the method in one phrase: letting the Wood flow out from within the Earth (土中泻木). Atractylodes and white peony, in equal parts, are its heart. Tangerine peel and siler complete them: without siler, which disperses, the sourness of the peony could lock in the Qi it has just softened. The aim is to soften without imprisoning.

Harmonises the Liver and Spleen: The atractylodes-peony pair works on both sides at once: one firms the Earth, the other restrains the Wood that overflows.

Supports the Spleen and digestive balance: Atractylodes supports the Spleen, and tangerine peel awakens it by moving the Qi of the centre.

Soothes the belly: Sour and cool, white peony relaxes what tightens, and siler, according to the commentator Wang Ang, relaxes the Spleen through its aroma.

Dries Dampness: Atractylodes and tangerine peel dry the Dampness that builds up when the Spleen weakens; siler backs them up, since according to tradition Wind overcomes Dampness.