Suddenly Can’t Catch Your Breath, Qi Sinking Down?
The opening: a perfectly healthy young man, suddenly unable to breathe
Today’s story is about Wang Zhusun, Doctor Zhang Xichun’s own nephew — family. He was in his twenties, exactly the age when a man is at his strongest. But this young man had fallen into a serious illness, and months had passed without any recovery.
How sick was he? His mind was clouded — all day long he was drowsy and muddled, nearly unconscious, barely able to string words together. His limbs were weak and aching, with no strength left in arms or legs. And he had a mild shortness of breath, as if he never quite had enough air. Doctors had been called before, but nobody could identify the cause, and the medicine did nothing at all.
💬 Note from Doctor Luo: Look at the opening — this is the face of a serious deficiency: clouded spirit, weak limbs, not enough air. The picture of deficiency is already showing, but nobody had thought deeply enough to see it.
How bad did it get? Twenty-odd struggling breaths before one real breath
Something far more frightening came next. One day, this young man suddenly lost the ability to breathe normally — the air wouldn’t come up, he couldn’t get a full breath. All he could do was open his mouth and push air out. He could exhale, but no matter what, the breath refused to come back in or rise upward — it all stayed trapped down in his belly. Worse still, the qi was drifting downward, sinking lower and lower, until it even pushed his anus out!
How agonizing was the suffocation? He had to struggle through twenty or so breathing efforts before one real breath would finally come up. And these attacks hit him eight or nine times in a single day and night!
💬 Note from Doctor Luo: This is what the classics mean by “exhaling through an open mouth while the breath cannot rise” — the mouth opens to push air out, but the breath can’t be lifted, and instead it sinks down. For the family watching, this must have been terrifying. Forget the earlier complaints — this one attack alone was already a dire emergency.
Doctor Zhang Xichun names it in one sentence: sunken chest qi
Only now did the family think to send for Doctor Zhang Xichun. Why not before? Likely because at that time Doctor Zhang was serving as a military physician with the army, traveling from post to post — it wasn’t until he was past fifty, when he reached Shenyang and founded the Lida Traditional Chinese Medicine Hospital, that he settled down. That’s why the family hadn’t been able to reach him. Now, with no other option, they finally brought him in.
Doctor Zhang took one look and said: this is sunken chest qi (da qi xia xian).
💬 Note from Doctor Luo: Sunken chest qi is actually something many people have today — it’s just that nobody used to think of this diagnosis. Some of my listeners, after hearing me talk about Doctor Zhang Xichun’s sunken chest qi, went and took Sheng Xian Tang (Lift the Sunken Qi Decoction) themselves, and their bodies clearly improved — breathing became smoother, their overall state righted itself, and some even said this formula saved their lives. What does that tell us? It tells us that many people really do have sunken chest qi; they just hadn’t been recognized and properly treated. We in Chinese medicine absolutely must understand sunken chest qi — otherwise you will misjudge some patients’ illnesses.
Sheng Xian Tang and Bu Zhong Yi Qi Tang: what’s the difference?
At this point many people ask: Sheng Xian Tang and Bu Zhong Yi Qi Tang (Tonify the Middle and Augment Qi Decoction) — aren’t they both about tonifying qi and lifting it up? What’s the difference?
Everyone, they act on different locations. Where does Sheng Xian Tang act? On the chest qi, chiefly the heart and lungs. Where does Bu Zhong Yi Qi Tang act? Chiefly on the spleen and stomach — it slowly tonifies the spleen and lifts the spleen qi. So the illnesses Bu Zhong Yi Qi Tang treats tend to be slow in onset and less severe — spleen-stomach weakness making the qi unable to rise. But sunken chest qi is often a case where the entire chest qi has already collapsed — extremely serious, to the point where breathing itself becomes difficult and the air won’t come up.
💬 Note from Doctor Luo: So remember: in an emergency use Sheng Xian Tang; for everyday qi deficiency from weak spleen and stomach, use Bu Zhong Yi Qi Tang — that one works on the spleen; Sheng Xian Tang works on the heart and lungs. The two are different. Doctor Zhang Xichun said that when the great qi sinks downward, it can no longer let the lungs breathe comfortably — which is why the air won’t come out.
In a crisis, Doctor Zhang Xichun did not use Huang Qi — he used Ren Shen
By rights, sunken chest qi should be treated with Sheng Xian Tang, whose main herb is sheng huang qi (astragalus). But what did Doctor Zhang Xichun prescribe this time? Ren Shen (ginseng) 30 g, Chai Hu (bupleurum) 9 g, Zhi Mu (anemarrhena) 6 g — just three herbs.
What does ginseng do? Tonifies qi and lifts the chest qi. Chai Hu at 9 g lifts things upward. And Zhi Mu at 6 g? It reins in ginseng’s warming nature — Doctor Zhang Xichun held that when a slightly warm, slightly hot herb like ginseng is paired with a cool, moistening herb, it stops being heating, and together they can greatly tonify qi and blood — not only tonify qi but also generate blood. This was the view of Zhang Yuansu.
💬 Note from Doctor Luo: Doctor Zhang Xichun had a signature technique: whenever he used a warming herb, he paired it with a cool, moistening one to balance it — that way you get the full tonifying power without worrying about it causing heat. Ginseng matched with Zhi Mu is the classic demonstration of this move.
One dose, and the breathing smoothed — then two tweaks, and a few doses cured it
How did the formula work? One dose, and the breathing was smooth — after a single serving, the breath came easily!
Then Doctor Zhang Xichun adjusted the formula: Chai Hu was reduced, because the qi had already been lifted; Zhi Mu was increased — it had been 6 g, now more — and why? Out of fear that the ginseng’s heat would flare up, so the cooling, moistening herb needed a larger share.
💬 Note from Doctor Luo: Notice this detail: once the medicine works, you don’t just stop and call it done — you adjust the combination to match the changing condition: cut back a little on the lifting herb, add a little more of the heat-checking herb. That is the wisdom of “always adjusting toward balance” in prescribing.
After the adjustment, he continued for a few more doses, and all the earlier ailments healed too — a few doses, and the illness was gone.
The finishing touch: why substitute Ren Shen for Sheng Huang Qi?
Everyone, Doctor Zhang Xichun’s analysis of sunken chest qi was uniquely insightful, but the most brilliant stroke in this formula was swapping ginseng in for the astragalus.
Doctor Zhang Xichun explained: this patient had been ill a long time and was depleted in body — the illness had dragged on so long that his vital qi (yuan qi) was exhausted. Sheng huang qi tonifies qi, but it doesn’t have ginseng’s power to replenish vital qi. Ginseng doesn’t just tonify qi — it also anchors and secures the vital qi: it greatly replenishes yuan qi and holds it fast. So in this situation, ginseng was the more fitting choice than astragalus.
💬 Note from Doctor Luo: This is the master’s sense of measure. Why do we call someone a master? Because the way they weigh a prescription is exquisite — they deliberate over every herb and, when the time comes to swap, they swap decisively. In the earlier cases we discussed, the situation was lingering external invasion with damage to vital qi and fluids — so he used sheng huang qi. Today’s case is chronic illness with depleted vital qi — so he brought in ginseng. That single swap is a commentary on Sheng Xian Tang itself: under what circumstances are you allowed to modify this formula? Here is your answer.
The closing: two points to remember
After studying this case, keep two things in mind:
First, sunken chest qi can produce this kind of deficiency-type breathing difficulty — after a long illness drains the body, sunken chest qi can leave the breath unable to flow smoothly.
Second, within Sheng Xian Tang, in certain emergency situations, sheng huang qi can be replaced with ren shen — in special circumstances, knowing this can be enough to tip the balance.
💬 Note from Doctor Luo: Doctor Zhang Xichun prescribed medicine his whole life and prized above all “sameness within difference” — with the same illness, patients differ in constitution and stage, so the medicine differs. The light touch of swapping ginseng for astragalus carries six words behind it: “chronic illness depletes the body, vital qi is exhausted.” Tomorrow we’ll continue and look at how Doctor Zhang Xichun used ginseng.
Compiled from Doctor Luo Dalun’s commentary on Doctor Zhang Xichun’s case records, originally published in Records of Chinese Medicine with Western Reference (《医学衷中参西录》, issued serially 1918–1934).