The middle burner

Where the middle burner is

Chinese medicine divides the trunk into three working spaces, together called the 三焦, sān jiāo — the three burners. The upper burner is everything above the diaphragm, where breath and circulation happen. The lower burner is everything below the navel, where what is finished with leaves. The middle burner is the space between them, and it is the one this essay is about: the spleen and the stomach, taken as a single axis rather than two organs.

The canon describes the three in one line of three images, and the image for the middle is the most physical thing in the sentence.

A steeping vat — 沤, òu, the word used for soaking hemp until the fibre separates. Slow, warm, wet work that turns one material into another. That is the tradition’s picture of digestion, and almost everything it says about food follows from it. A vat works if it is kept warm and not overfilled. It stops working if the fire under it goes out, if it is packed too full, or if it is flooded with cold water. Those three failures are the whole of what this vocabulary means by weak digestion.

A word about the word spleen. The Chinese term is 脾, pí, and it is translated as spleen for historical reasons rather than anatomical ones. What the texts describe under that name — turning food into usable substance, lifting what is nourishing upward, keeping blood inside its vessels, governing the strength of the limbs — does not map onto the organ a surgeon removes. Read it as the name of a function, not of a lump of tissue, and the rest of this essay holds together. Read it anatomically and none of it will.

Li Dongyuan and the Pi Wei Lun

The middle burner has a founder. Li Gao (1180–1251), known by his sobriquet Dongyuan, was one of the four great physicians of the Jin–Yuan period and a student of Zhang Yuansu. He wrote the 脾胃论, the Pi Wei Lun — Treatise on the Spleen and Stomach — in three volumes, finishing it in 1249, two years before he died.

The book came out of a catastrophe. In 1232 the Jin capital at Kaifeng was besieged, and after months of hunger, exhaustion and fear the deaths ran far beyond anything the fighting explained. Li watched the physicians of the city read those deaths as cold damage contracted from outside — the standard framework since the Shanghan Lun of around 200 CE and its 398 clauses — and answer them with cooling, draining methods that made worn-out people worse. He argued they had the direction wrong. The injury had come from inside: from months of irregular eating, overwork and dread wrecking the middle.

He set the argument out first in the Nei Wai Shang Bian Huo Lun of 1247 — Clarifying Doubts About Injury from Internal and External Causes — and then more fully in the Pi Wei Lun. The sentence the whole school is built on is eight characters long.

The school he founded is still called 补土派, the supplement-the-earth school — earth being the phase the spleen and stomach belong to in the five-phase scheme. Li composed formulas to do that supplementing, and they are studied in China to this day. We should be exact here: we do not send herbs, we do not write formulas, and nothing in this essay is about them. What we take from Li Dongyuan is the argument, not the pharmacy. The argument is that the middle is where a person is worn down first, and that it is worn down by ordinary things — skipped meals, cold meals, meals eaten in a hurry at a desk, and years of not sleeping.

What “weak digestion” means here

In this vocabulary, weak digestion is not an upset stomach. It is a collection of reported experiences that tend to travel together, and a reader usually recognises four or five of them at once:

• Bloating that arrives after eating rather than before, and is worse late in the day than early.
• Tiredness twenty or thirty minutes after a meal — the specific need to sit down after lunch.
• A stool that is unformed, or that alternates, or that is difficult to finish.
• No appetite in the morning at all, and a real appetite arriving at nine at night.
• Heaviness in the arms and legs; a body that feels as though it weighs more than it does.
• Scalloped, tooth-marked edges on the tongue, and often a pale, wet-looking body to the tongue as a whole.
• Easy bruising, and a general sense of things sinking rather than holding — which is what the texts mean by the spleen failing to raise the clear.

These are the observations behind the group of patterns that carry spleen and qi in their names. They are not a disorder and they are not a finding. They are a way of summarising what a person has told us, in a vocabulary that then suggests what to change.

What a weak middle makes

The tradition adds one further step, and it is the step that connects this essay to almost every other page on this site. A vat that is not working properly does not simply do less. It leaves things unfinished, and the unfinished residue is what the texts call 湿, shī — dampness.

Damp is described as heavy, sticky and slow to shift. It is said to settle low, to make the head feel wrapped, to coat the tongue thickly, and to be made worse by the very foods people reach for when they are tired: sugar, dairy, fried things, alcohol, and anything cold and raw in quantity. There is an aphorism about it — 脾恶湿, the spleen dislikes damp — and the loop it describes is the point. A weak middle makes damp, and damp weakens the middle further.

Whether or not the loop is real in any measurable sense, it is a good description of how people report feeling in a wet August, and the seasonal kitchen is organised around breaking it: aromatic, drying, warm, and less of everything sweet. The list of ingredients the tradition puts to that work sits in food as medicine.

Why it comes back to breakfast

The traditional day-clock gives the two hours from seven to nine in the morning to the stomach and the two after that to the spleen. We said in the essay on sleep what that scheme is and is not: a filing system built from centuries of bedside notes, not a claim about physiology. But it does put the case for breakfast in one line, and the case is worth putting.

The practical version has nothing mystical in it. A middle described as a warm vat does its worst work when it is asked to start from cold, and the standard Western breakfast is the coldest meal of the day: refrigerated milk on dry cereal, iced juice, a smoothie straight from the blender, or nothing at all followed by coffee. If a person is going to eat one warm, cooked, unhurried meal in a day, the tradition is unanimous that it should be the first one.

What that looks like in practice is deliberately unglamorous. Congee, which takes an hour unattended and reheats all week. Oats cooked with water and a little ginger. Eggs and toast, eaten sitting down. Soup, which is a completely normal breakfast across most of China and only strange in Europe. Warm water rather than cold with it. Twenty minutes rather than eight.

Two points you can reach yourself belong to this territory and appear in a great many of our readings. Zusanli (ST36) sits four finger-widths below the lower edge of the kneecap and one finger-width to the outside of the shin bone; it is probably the most-used point in the entire tradition. Zhongwan (CV12) sits on the midline, halfway between the navel and the lower end of the breastbone. Slow, firm, circular pressure for a minute or two, once or twice a day.

What we actually write

We went back through a year of readings while planning this essay to check whether the claim in the first paragraph was true, and it more or less is. We could find very few that said nothing at all about the first meal of the day. It is not a house habit and it is not a formula we fall back on. It is that thirty questions about energy, appetite, stool, sleep and the tongue converge on the middle more often than they converge anywhere else, and once they have converged there, breakfast is the intervention with the shortest distance between reading it and doing it.

It is also the suggestion people ignore for longest and then write back about. The note we get, months later, is almost always the same shape: nothing dramatic happened, the afternoon simply stopped being an ordeal. That is about the size of what food does. We would rather promise that accurately than promise something larger badly.

Where this stops

Everything above is a description and a set of suggestions about eating, pressing and timing. It is educational writing from the perspective of one tradition, and it is not care from a clinician. Digestion in particular is a place where something that needs proper attention can hide behind a comfortable traditional description for months, so we would rather lose the sale than have that happen.

Li Dongyuan’s book is nearly eight hundred years old and its central claim is almost aggressively mundane: look after the middle, eat warm food at regular hours, and do not exhaust yourself. He wrote it having watched a city die of the opposite. It has not needed revising.