Shiguan

What is KI18?

KI18 (Shiguan) is a Kidney-channel point on the upper abdomen, about four finger-widths above the navel and a half-thumb out from the midline.

Its Chinese name, Shiguan, is usually translated as "Stone Pass". It is one of a vertical row of Kidney points that runs up the belly either side of the midline. Classical texts group these abdominal Kidney points with the Chong Mai, one of the eight extraordinary vessels, and link them to digestion, menstruation and fertility.

Traditionally KI18 was used for cramping abdominal pain, constipation, vomiting, hiccups and period problems. In a self-care setting it is simply a spot on the upper belly that people rest warm fingers on.

Here is the honest verdict on the evidence: there is essentially no point-specific human research on KI18. A long history of use tells you that practitioners valued it. It does not tell you that pressing it works, and it does not tell you that pressing it is safe for you. Those are two separate questions, and tradition answers neither.

What little supportive evidence exists is indirect. Some small trials of abdominal massage and general acupressure for constipation and for period pain report modest benefit, but those studies did not isolate KI18, and most were small, short and unblinded. That is a long way from proof.

The other thing to understand about KI18 is where it sits. The abdomen has no bony shield. Underneath your fingers are the stomach, bowel, the large blood vessels of the midline and, higher up, the edge of the liver. That does not make gentle finger pressure dangerous for most healthy people, but it does mean the "who should avoid it" list for this point is longer and more serious than for a point on the wrist or ankle.

Treat KI18 as a comfort measure you may find pleasant, used alongside ordinary medical care rather than instead of it. Nothing on this page is a treatment for a diagnosed condition.

Where is KI18 and how do you find it?

KI18 sits on the upper abdomen, roughly 6-7 cm (four finger-widths) straight above the centre of your navel, then about 1 cm out to either side of the midline.

• Start at your navel. Lie on your back with your knees bent and feet flat. This softens the belly wall and makes the landmarks easier to feel.
• Measure up the midline. Place four fingers sideways above your navel, fingers together. The top edge of your index finger marks the right height. In classical terms this is 3 cun above the navel.
• Step off the midline. From that spot, slide half a thumb-width to the side, about 1 cm. That is KI18. There is a matching point on the other side.
• Check your midline first. Run a finger up from the navel towards the breastbone. That straight central line belongs to the Conception Vessel, not the Kidney channel. KI18 is just beside it, not on it.
• Don't drift too far out. Two thumb-widths from the midline is a different point on the Stomach channel. KI18 is close in, almost hugging the centre line.

There is no bone to land on here, so you are working from soft-tissue landmarks only. Agreed anatomy is simple: upper abdomen, level with the fourth point up from the navel on the midline, half a cun lateral. If your proportions differ from the average, trust the four-finger measure from your own hand rather than a fixed number of centimetres.

KI18 does not give a reliable sharp "zing". Most people feel nothing more than soft pressure, perhaps a vague fullness. That is normal and does not mean you have missed it.

One warning while you are exploring. If you feel a strong pulse beating under your fingertips, or a firm lump that was not there before, take your hand away and do not press. Have that checked by a doctor rather than working on it.

How do you apply pressure to KI18?

1. Pick your moment. Wait at least an hour after a meal and empty your bladder first. A full stomach makes abdominal pressure uncomfortable and pointless.
2. Lie down and soften. On your back, knees bent, feet flat. A tense belly wall resists pressure; a relaxed one does not need much.
3. Warm your hands. Rub your palms together. Cold fingers on the abdomen make most people flinch and brace.
4. Use flat finger pads. Place the pads of your index and middle finger on KI18. Never use a knuckle, a thumb tip, a pen cap or any hard tool on the belly.
5. Sink slowly on the out-breath. Let your fingers settle as you exhale. Go gently and stop as soon as you meet resistance.
6. Keep it light. Aim for mild, comfortable pressure, around 2-3 out of 10. The abdomen needs far less force than a point on the hand or foot.
7. Hold or circle. Hold steady for 30 to 60 seconds, or make slow small circles without sliding the skin. Then release just as slowly.
8. Repeat sensibly. Two or three rounds per side, once or twice a day, is plenty. Both sides can be worked together with one hand on each.
9. Stop at these signals. Stop at once for sharp pain, nausea, a pulsing feeling under your fingers, dizziness or any pain that lingers after you lift your hand.

Many people find simple warmth more pleasant than pressure here. A warm palm resting on the area, or a covered hot water bottle, gives a similar comforting effect with no force at all.

Finger pressure only. Nothing on this page involves needles, heat applied to the skin, cupping or anything that breaks the skin. Do not attempt those on yourself.

If a session leaves your belly sore, tender to touch, or bruised, you pressed too hard. Leave it alone for several days and use noticeably lighter pressure next time, or skip the point entirely.

What is KI18 traditionally used for?

• Cramping abdominal pain. The classical headline use for Shiguan is pain and tightness in the belly. Human evidence for pressing this specific point is absent. Small, mostly unblinded trials of general abdominal massage report short-term easing of cramp, but none isolate KI18.
• Constipation. Tradition lists KI18 for dry, difficult stools. Modern abdominal massage studies, several in older adults and nursing-home residents, show modest improvement in stool frequency. Those studies used broad massage over the whole abdomen, not one point, so the credit cannot be given to KI18.
• Vomiting, hiccups and reflux. Shiguan was used for "rebellious" stomach qi rising upward. For nausea specifically, the point with real controlled human evidence is PC6 on the inner wrist, not KI18. If nausea is your concern, PC6 is the better-supported option by a wide margin.
• Period pain and irregular cycles. The Kidney abdominal line is tied to the Chong Mai, which tradition links to menstruation. Trials of acupressure for period pain are small and often use SP6 or other points; there is no trial evidence for KI18 here.
• Difficulty conceiving. Older texts list Shiguan among points for infertility. This claim has no supporting human trial data at all. Do not delay or replace fertility investigation on the strength of it.
• Postpartum abdominal pain. A traditional use only. Pressure on the abdomen soon after childbirth, and especially after a caesarean, is not something to do on your own judgement.

A fair summary: KI18 has a consistent traditional role in digestive and gynaecological complaints, and no point-specific human evidence behind any of it. The gentle warmth and slow breathing that come with the practice may be relaxing in their own right, which is worth something but is not the same as the point doing the work.

Are there tips for using KI18 effectively?

• Less force than you think. The abdomen is unprotected by bone. If you are using the pressure you would use on a shoulder knot, you are using several times too much here.
• Breathe with it. Let your fingers sink on the exhale and float on the inhale. Slow breathing is probably doing at least as much of the relaxing as the point itself, and that is fine.
• Work both sides. KI18 is paired. One hand each side of the midline, pressing together, feels more balanced than favouring one side.
• Warm first. A warm palm or a covered heat pack on the belly for a minute makes the area far more receptive and is often more comfortable than pressure alone.
• Time it away from food. An hour after eating is a sensible minimum. Pressing a full stomach is unpleasant and can trigger reflux.
• Keep sessions short. A couple of minutes a side is enough. Longer or harder work on the abdomen brings soreness without any evidence of extra benefit.
• Give it a fair trial, then judge. Try it daily for a week or two and note what actually changed. If nothing has, stop. There is no evidence that persistence eventually unlocks an effect.
• Pair it with the boring things that work. For constipation, fluid, fibre, movement and a regular toilet routine have far stronger evidence than any acupressure point. Use KI18 alongside them, never instead.
• Choose the better-evidenced point when one exists. For nausea, use PC6 on the inner forearm. It has real controlled human trials behind it; KI18 does not.
• Keep notes if you have a cycle-related complaint. Period pain varies month to month on its own. Without a record, you cannot tell improvement from normal variation.

One practical point about expectations. Most people feel nothing dramatic at KI18, no referred sensation and no rush of warmth. That is the usual experience, not a sign of poor technique.

What do people get wrong with KI18?

• Expecting a cure. The single biggest error. KI18 is not a treatment for infertility, constipation or a gut condition, and nothing here will cure anything. Expecting that leads people to postpone a diagnosis that matters.
• Pressing far too hard. People transfer deep-tissue force from the back or shoulders to the belly. The abdomen has no bony floor, and hard pressure here causes soreness and bruising rather than benefit.
• Landing on the midline. Sliding onto the central line puts you on a Conception Vessel point, not KI18. The Kidney point is about a centimetre to the side.
• Drifting too far out. Two thumb-widths from the midline lands on the Stomach channel instead. KI18 stays close to the centre.
• Measuring in fixed centimetres. Four finger-widths above your own navel is more reliable than a number copied from a video filmed on someone else's body.
• Using a tool. Massage sticks, knuckles and pen ends concentrate force into a tiny area of soft abdomen. Flat finger pads only.
• Working through undiagnosed pain. Pressing a belly that already hurts, especially if the pain is new, severe or worsening, can mask something urgent. Get it looked at first.
• Ignoring a pulse under the fingers. A strong beating sensation means you are over a large blood vessel. Take your hand off; do not try to "work through" it.
• Pressing right after eating. This reliably causes discomfort and reflux and teaches people that the point "doesn't agree" with them.
• Reading tradition as safety clearance. Centuries of use say nothing about whether the point is safe over your hernia, your scar or your pregnancy. That is a separate judgement.

What does the research on KI18 actually say?

No useful human research on KI18 specifically was found. There are no controlled trials, and no case series we can point to, that tested pressing Shiguan on its own for any condition.

What exists is adjacent and much weaker than it first looks. Trials of whole-abdomen massage for constipation, several run in nursing homes and in people with spinal cord injury, report modest gains in stool frequency and comfort. Those studies treated a broad area of the belly with strokes and kneading. They did not target KI18, and their design cannot tell you whether any one point contributed anything.

Likewise, acupuncture studies for digestive complaints and period pain sometimes include abdominal Kidney-channel points within a multi-point prescription. When a trial needles eight or ten points at once, you cannot extract the effect of one of them. Those are also reports of what the trial did, not instructions; needling is not something to attempt at home.

For comparison, PC6 and nausea is the clearest acupressure success story in the literature, with repeated controlled trials in pregnancy sickness and after surgery showing a real, if moderate, effect. KI18 has nothing resembling that evidence base. The gap between the two is large and worth being honest about.

What this means practically is simple. Any benefit you notice from KI18 could be the warmth, the slow breathing, the lying down, the natural ebb and flow of the symptom, or expectation. None of those are shameful reasons to feel better, but none of them are the point doing the work either.

Treat KI18 as an untested comfort practice. Keep it cheap, keep it gentle, and never let it stand in for investigating a symptom that is new, severe or getting worse.

When to see a doctor

See a doctor for abdominal pain that is severe, sudden or worsening, for a fever with belly pain, for vomiting that will not stop, for blood in your stool or vomit, for unexplained weight loss, or for a change in bowel habit lasting more than two weeks.