Shenfeng

What is KI23?

KI23 (Shenfeng) is a Kidney-channel point on the front of the chest, in the fourth gap between the ribs, about two thumb-widths from the breastbone.

Its pinyin name, Shenfeng, is usually translated as "Spirit Seal". It is one of six Kidney points that run up the chest beside the breastbone, between KI22 below it and KI24 above it. Classical texts group these points together and give them a similar job: easing cough, wheeze and a tight, full feeling in the chest.

Two things are worth saying once, clearly, before anything else on this page. A long tradition behind a point is not evidence that pressing it does anything, and it is not evidence that pressing it is safe for you. Those are separate questions, and this page keeps them separate.

The honest verdict on the evidence: there is essentially no human research on KI23 itself. No controlled trial has tested this point for cough, asthma, chest tightness or anything else. What exists is tradition, plus a general acupressure literature made up of small, short and mostly unblinded studies on other points.

That is not the same as saying it does nothing. It means nobody has measured it. Some points do have decent human evidence for a specific use, and the library says so plainly when they do. PC6 for nausea is the clearest example in the whole field. KI23 is not in that category, and dressing it up as if it were would be dishonest.

KI23 also sits over the chest wall, close to the heart and lungs. That makes the safety section unusually important. Gentle finger pressure on the chest wall is a low-risk thing for most healthy people, but chest symptoms are not something to self-treat while you wait and see. If you have new or changing chest pain, this page is not where your decision should end.

Everything described here is self-applied finger pressure. Nothing on this page involves needles, heat or anything that breaks the skin.

Where is KI23 and how do you find it?

KI23 sits in the fourth gap between the ribs, roughly two thumb-widths out from the midline of the breastbone, on the front of the chest.

• Start at the breastbone. Run a finger down the centre of your chest. The flat bony plate is the sternum (breastbone), and its centre line is your reference for everything that follows.
• Find the sternal angle. About 5 cm below the notch at the base of your throat, the breastbone has a slight ridge you can feel. The second rib joins the breastbone right at that ridge.
• Count down the gaps. From the second rib, step down over rib three and rib four. The soft gap just below the fourth rib is the fourth intercostal space (the fourth gap between ribs). That is the level of KI23.
• Move out from the midline. The Kidney chest points sit 2 cun from the midline. In practical terms that is about two thumb-widths, or roughly 4 cm, so the point lands just past the edge of the breastbone, not on it.
• Use the nipple as a cross-check. In most men the nipple sits at this same rib level but further out, about four thumb-widths from the midline. KI23 is at that height, but roughly halfway back towards the breastbone.

You should feel a soft hollow between two firm ribs, not hard bone. If your finger is on a rib, slide a few millimetres up or down until it drops into the gap.

Check which point you have. One gap lower is KI22 (Bulang); one gap higher is KI24 (Lingxu). They feel almost identical, so count your ribs rather than guessing.

In people with breast tissue, the fourth gap may sit at or under the upper edge of the breast. Work on the firm chest wall near the breastbone, and do not press into soft glandular tissue.

How do you apply pressure to KI23?

1. Sit upright and settle. Sit with your back supported and shoulders loose. Breathe normally for a few breaths before you start, so you can tell later whether anything actually changed.
2. Place the flat pad of one finger. Use the pad of your index or middle finger on the gap between the ribs. A flat pad spreads the load; a fingertip or nail digs into one spot and hurts.
3. Press straight in, gently. Aim for light to moderate pressure only. On the chest wall that means a firm, steady contact you would rate about 3 out of 10, not a push that makes you brace or hold your breath.
4. Hold or circle for 30 to 60 seconds. Either hold steady or make small slow circles without sliding your finger across the skin. Keep breathing slowly and evenly the whole time.
5. Do the other side. KI23 is a paired point, one on each side of the breastbone. Most people do one side then the other rather than both at once.
6. Repeat sparingly. Two or three rounds per side in a session is plenty. Once or twice a day is a reasonable ceiling for a self-care routine.
7. Finish and notice. Take a few easy breaths and check how your chest feels. If nothing has shifted after a week or two, this point is probably not doing much for you.

Stop immediately if the pressure causes sharp pain, if a cough or wheeze gets worse, or if you feel light-headed, short of breath or sick.

Do not press through numb skin, a rash, a bruise or any area you cannot feel properly. Keep sessions short rather than long and hard; the chest wall bruises more easily than people expect.

What is KI23 traditionally used for?

• Cough and wheeze. This is the main classical use of the Kidney chest points, KI23 included. No controlled human trial has tested finger pressure on KI23 for cough or asthma, so treat this as tradition only and keep using any prescribed inhaler or medicine.
• Chest tightness and fullness. Tradition describes KI23 as easing a stuck, full feeling in the chest. Some people find slow pressure plus slow breathing relaxes the chest wall, but there is no study separating the point from the breathing or the simple act of resting.
• Nausea and vomiting. Classical sources link the Kidney chest points to upward-rebelling qi, which covers retching and vomiting. The real human evidence for acupressure and nausea sits with PC6 on the forearm, not with KI23, and PC6 is where the trials are.
• Breast discomfort. Because of where it sits, KI23 appears in older texts for breast pain and swelling. There is no modern human evidence for this, and a hot, red, painful breast needs medical assessment rather than pressure.
• Unsettled feelings and anxiety. The name Shenfeng ("Spirit Seal") has led to its use for a restless or anxious chest. This is a claim built on naming and tradition, not on measured outcomes, and no trial has looked at it.
• Poor appetite. Some point lists mention appetite and an inability to eat. The evidence here is textual rather than experimental, and ongoing appetite loss is a symptom worth investigating properly.

Across all of these, the pattern is the same: a long written tradition and almost no measurement. Acupressure research in general is dominated by small, short, unblinded studies, and KI23 does not even have those.

It is reasonable to use KI23 as a calming self-care ritual alongside proper treatment. It is not reasonable to expect it to replace treatment for a lung, heart or breast condition.

Are there tips for using KI23 effectively?

• Find the gap, not the rib. The point lies in the soft space between ribs. If your finger feels hard bone the whole way, shift a few millimetres up or down until it settles into the hollow.
• Count ribs every time. Chest points are easy to mix up. Spend ten seconds finding the sternal angle and counting down, so you know you are on KI23 and not KI22 or KI24.
• Pair it with slow breathing. Breathe out slowly as you press in. Slow exhaling calms the body on its own, and it makes the whole routine more useful whatever the point is doing.
• Use less force than you think. The chest wall is thin and the ribs are close to the surface. Light steady pressure is better tolerated and less likely to leave a tender spot the next day.
• Warm your hands first. Cold fingers on the chest make people tense up and hold their breath, which works against the point of the exercise.
• Keep it short and regular. A minute per side, once or twice a day, is more sustainable than a long session you dread. Regular and gentle beats occasional and hard.
• Keep a simple log. Note the date, what you did and how your chest or cough felt afterwards. Two weeks of notes will tell you more than any point description, including this one.
• Keep your medicines going. If you use a reliever inhaler, a preventer or any prescribed treatment, keep using it exactly as directed. Acupressure sits alongside that, never instead of it.
• Work on the chest wall, not soft tissue. If you have breast tissue in the way, stay on the firm bony chest wall close to the breastbone rather than pressing into the breast itself.

What do people get wrong with KI23?

• Expecting a cure. The commonest mistake of all. KI23 will not cure asthma, a chest infection or heart disease, and nobody should promise it will. Treat it as a comfort routine, not a treatment.
• Miscounting the ribs. Starting from the collarbone instead of the sternal angle usually puts people a full gap out, landing on KI24 or KI22. Find the ridge on the breastbone first and count down from the second rib.
• Pressing on the rib itself. Landing on hard bone instead of the soft gap between ribs. It hurts, it can leave the chest wall tender for days, and it misses the point entirely.
• Going too deep. People treat the chest like a tight shoulder and lean in hard. Deep digging over the ribs and the cartilage near the breastbone can cause a lingering ache, especially if you already have costochondritis (inflamed rib cartilage).
• Drifting too far out. KI23 sits about two thumb-widths from the midline. Sliding out to the nipple line takes you off the Kidney channel altogether.
• Treating chest pain as a qi problem. Assuming that pressure, tightness or pain in the chest just needs the right point. New chest pain needs assessment, not acupressure, and delay is the real danger.
• Skipping or delaying medication. Reaching for a point instead of a reliever inhaler during a flare-up. That swap can turn a manageable episode into an emergency.
• Pressing into breast tissue. Digging into a lump or a sore area of the breast in the hope of shifting it. Any new lump, skin change or one-sided breast pain should be examined by a clinician.
• Doing it for too long. Ten minutes of hard pressure does not beat one minute of gentle pressure. It just makes the skin and ribs sore.

What does the research on KI23 actually say?

There is no useful human research on KI23 specifically. No controlled trial, and no decent observational study, has tested finger pressure on this point for cough, asthma, chest tightness, nausea or anxiety.

That matters, and it is worth being clear about what it does and does not mean. It does not mean KI23 has been tested and failed. It means nobody has measured it, so any confident claim about what it does, in either direction, is going beyond the evidence.

The wider acupressure literature does not fill the gap. Most trials in the field are small, short and unblinded, which means participants knew they were getting treatment. That matters for symptoms like breathlessness and anxiety, which respond strongly to attention, reassurance and rest. Results from those studies cannot simply be transferred to a point nobody studied.

Where the field is stronger is worth naming for contrast. PC6 on the inner forearm has repeated controlled human trials for nausea and vomiting, including after surgery and in pregnancy. The effect is modest but real, and it is the clearest signal in the whole acupressure literature. KI23 has nothing comparable.

Studies on acupuncture for asthma and chronic cough exist, and some of them needled chest and back points. Those trials used needles inserted by trained practitioners, which is a different intervention from pressing a finger on your own chest. Their results say nothing reliable about self-applied pressure on KI23, and this library does not teach needling.

If you want to know whether KI23 helps you, the practical answer is a personal trial. Keep your usual treatment unchanged, add the point for two weeks, and write down what happens. That is weak evidence in the scientific sense, but it is honest, it is cheap, and it is the only data that exists for your own chest.