條口 Tiaokou
“Slender Opening” · ST38
Foot Yangming · 38 of 45
Where. Halfway between the outer knee hollow and the outer ankle bone, one finger out from the shin.
For. Calf cramps, shoulder ache, numb feet.
Press. Firm thumb pressure, about a minute each leg.
條口，在下廉上一寸按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Tiaokou Sits on the Shin
The dataset gives Tiaokou’s address in four clauses, and together they triangulate the spot nicely: on the anterolateral aspect of the lower leg, 8 cun below Dubi (ST35), one finger-breadth lateral to the anterior crest of the tibia, midway between the popliteal crease and the lateral malleolus. Unpacked: the point sits on the front-outer slope of the shin, counted straight down from Dubi, the knee-point that nestles in the hollow just outside the patellar ligament beneath the kneecap. Eight cun down brings you to the station — and a cun, as everywhere on these channels, is a proportional unit, roughly one thumb-width taken from the person being examined rather than from a ruler. The fourth clause doubles as an independent check: the traditional scheme measures the whole lower leg at sixteen cun from the crease behind the knee to the tip of the lateral malleolus, the knuckle of bone on the outside of the ankle, so halfway between those two marks is exactly eight cun. One description counts down from the knee; the other finds the middle. They agree.
What lies under the fingertips here is among the friendliest territory on any channel. One finger-breadth out from the sharp bony ridge that runs down the front of the shin — the anterior crest of the tibia — the surface leaves the bone and opens into a broad, fleshy slope. Beneath it sit the muscles that lift and steady the foot, strung between the shin’s two long bones: the tibia, larger and nearer the body’s midline, and the fibula, slimmer and set toward the outside. Press gently and the give is muscular, not bony; the structures of consequence nearby — vessels and nerves threading between the two bones — lie well beyond anything fingertip pressure reaches. Compared with the chest, abdomen, or neck, this is forgiving ground, which is precisely why gentle, patient self-care suits it.
Neighbors make the address easier to trust. The same road down the front-outer shin carries an orderly ladder of stomach-channel stations: Zusanli (ST36) three cun below Dubi, Shangjuxu (ST37) six cun below, Tiaokou itself at eight, and Xiajuxu (ST39) one cun further down at nine. At the same height as Tiaokou, set further out toward the fibula, stands Fenglong (ST40), whose own record describes it as lying lateral to Tiaokou. Read downward, the ladder runs three, six, eight, nine — unevenly spaced, which is why counting beats guessing, and why the halfway mark between crease and ankle-tip makes such a useful second opinion. Each station exists twice, mirrored left and right. If a search wanders, nothing is lost: return to the ridge of the shin or the tip of the outer ankle and begin again. The landmarks repeat themselves patiently.
A Self-Palpation Walkthrough
Sit upright on a firm chair with both feet planted and the calves released. Start by fixing the two ends of the map: slide your fingers into the crease behind the knee — the popliteal crease — and then find the tip of the lateral malleolus, the bone-knob at the outside of the ankle. Fold that distance in half in your mind; the halfway mark is Tiaokou’s height. Now bring your fingers forward around the outside of the shin onto its front-outer slope, find the sharp ridge of the tibia running down the front, and step one finger-breadth outward from it. Settle your fingertips into the flesh there, in the groove-like seam the point is named for. If you prefer counting to folding, begin instead in the hollow just outside the strong cord below the kneecap — Dubi’s neighborhood — and measure down eight proportional thumb-widths; slower, but equally faithful to the record.
A few quiet confirmations turn a guess into a find. Touch feather-light and compare sides: many people notice a faint, dull awareness at the true spot and little sensation a finger-width away. Then test the muscle: rest one hand over the located point and slowly lift the forefoot of that foot from the floor, keeping the heel down if you can — the muscle bundle under your fingers should gather and firm, because lifting the forefoot is its work. Wiggle the toes and feel the faint stir beneath. Check the height once more: the spot should sit about midway between the crease behind the knee and the tip of the outer ankle bone, neither up near the knee nor down where the calf narrows toward its tendon. Three agreements — height, ridge-distance, working muscle — pin the placement down.
Three slips account for most missed attempts. The first is hugging the ridge: with a fingertip still on the tibial crest everything feels like bone, and no amount of pressing improves it — move outward a full finger-breadth. The second is drifting backward around the shin toward the fibula, where the slope steepens and the tissue thins against the deeper bone; the point stays on the front-outer face, not the side. The third is hunting too low, sliding into the narrowing calf where muscle gives way before the heel-cord. And whatever the position, a braced leg and a held breath make every square centimeter feel identical; release the calf, exhale, and let the fingers start again from the landmarks. None of these slips costs anything but a minute.
Reading the Name: Slender Opening
Read character by character, the name draws a picture of the terrain. Tiao 條 belongs to the family of slender things: dictionaries trace it to a small branch or twig, and it survives today in strips and streaks — it is even the measure word for long, thin objects, and it stands inside the word for noodles. Kou 口 means mouth, opening, aperture. Joined, Tiaokou reads as the slender opening, and the geography supplies the sense: halfway down the shin, between the two long bones, the muscles part along a long narrow seam, and the point waits inside that slit-like groove. The name is a miniature map.
Naming points after local terrain is an old habit of the channel cartographers, and this stretch of the stomach channel offered plenty of terrain to name. Classical texts describe the channel stepping over the knee after its long descent from the face, down the throat, and across the chest and abdomen, then continuing along the front-outer shin toward the instep and the second toe; along this stretch the two bones leave their seam plainly visible, and gates, valleys, granaries, and openings dot the surrounding map. One honest observation belongs here: the licensed dataset records no special classical title or point class for Tiaokou — no gathering-office, no named command. Its standing in the tradition rests not on an office it holds but on what practitioners asked of it, and the record shows they asked often, particularly for tired, numb, unwilling legs.
Pinyin renders the name Tiáokǒu. The first syllable, tiao, rides the second tone — rising steadily, the way a question lifts at its end; the second, kou, falls and then lifts again on the third tone, the dipping tone that gives Mandarin its characteristic valley. Checked character by character: 條 is tiáo, second tone; 口 is kǒu, third tone. The two hanzi are compact enough to memorise at a glance. As with so many stations named for architecture and landscape, the metaphor does real work — it tells the seeking hand to stop looking for a bump and start looking for a groove.
Traditional Indications, Explained
The recorded indications make a distinctive list: atrophy and paralysis of the lower limb, cramps, shoulder and arm pain, epigastric and abdominal pain, and numbness of the foot. Take them as tradition reports them. Classical writers gathered weakness, wasting, and limpness of the limbs into one family of patterns — the old literature’s wei, often glossed as wasting — understood as sinew and muscle losing their nourishment. The yangming systems, stomach and large intestine alike, enjoyed particular esteem in that discussion: classical teaching described them as rich in qi and blood and as the nourishers of flesh, so stations along the foot-yangming road down the leg became natural gathering places whenever a weakened leg was the complaint.
Cramps and numbness belong to the same household of leg complaints, and tradition handled them with the same logic: cold, fatigue, and overexertion were read as qi and blood failing to warm and moisten the sinew, and points along the channel threading through the leg were approached accordingly. The epigastric and abdominal pain on the list follows a different road: the stomach channel sweeps across the trunk before it ever reaches the knee, and it belongs to the stomach itself, so discomfort through the middle of the body was read back onto its route. None of this is mechanism in the modern sense; it is the traditional grammar of correspondence, faithfully reported.
The last indication is the famous one: why should a point halfway down the shin appear in discussions of shoulder and arm pain? The classical answer travels the same-family road. The tradition groups the stomach and large intestine channels together as the two yangming lines, and imagined same-family channels answering one another across distances; the large intestine channel, for its part, climbs the arm and crosses the shoulder country before reaching the face. A distant leg point on the foot-side member of that family therefore stood ready to speak, in the traditional idiom, to the shoulder’s troubles. Say plainly what this is: recorded traditional reasoning, offered for cultural understanding. Modern research on any single point remains thin, and reviews of self-applied pressure suggest effects are modest and context-dependent. Nothing here is a treatment claim, and persistent symptoms belong with a qualified clinician.
Self-Care Acupressure at Home
With the point located by the walkthrough above, settle in: seated, the foot resting flat or the heel lightly on the floor, shoulders easy. Curl your index and middle fingers together and rest the pads — not the tips — in the groove. Begin with contact alone for a few breaths, then add small, slow circles, letting the skin glide over the muscle beneath rather than grinding into it. Pressure should register as pleasant dullness or mild warmth, never sharpness. A common home rhythm is one to three minutes per side, once or twice daily, matched where possible to slow exhales so each circle rides the breath out. Swap hands and repeat on the other side, keeping the sessions symmetrical.
Quality matters more than duration. Light, patient, regularly repeated contact fits the wellness register this page practises; hard jabbing causes harm and teaches the body nothing. Warm cold hands first, because chilled muscle guards. Choose a quiet corner over a screen, since the practice doubles as a breathing pause: inhale through the nose, feel the lower leg under still fingers, press gently on the long exhale. People who keep a routine often anchor it to an existing habit — morning washing, an afternoon stretch, the evening wind-down — because consistency, not intensity, is what self-care traditions actually ask for.
Treat the exercise as a small ceremony of attention rather than a treatment session. Notice what changes across weeks: perhaps the area feels less guarded, perhaps the leg feels lighter while you press, perhaps nothing shifts except that you spend a couple of minutes attending to your own body. Every one of those outcomes fits the honest scope of self-acupressure. What does not fit is escalation — pressing harder, longer, or deeper to force a result. When curiosity pulls that way, return to gentleness or simply stop for the day.
Cautions and Safe Practice
An honest oddity comes first: the licensed dataset records no specific caution for this point — an empty caution column, less common across the catalogue than you might expect. Read it correctly. An empty column is not an invitation to force; it simply records that generations of compilers flagged no special danger here, and it reflects professional technique rather than home practice. What remains true is plain anatomy: vessels and nerves travel between the two bones of the shin, and the respectful answer is to stay on the surface. Gentle fingertip work on healthy skin engages little more than skin and the outer layer of muscle — and that is exactly as deep as home practice ever needs to go.
For fingertip acupressure the practical rules follow. Keep pressure light and superficial, using pads and never elbows, knuckles, or tools. Skip the point entirely over broken, irritated, or healing skin; after recent injury or surgery in the area, until a clinician clears ordinary activity; and during any feverish illness. Sharp, electric, or radiating sensation means stop at once and do not try again that day. Pregnant readers, and anyone living with circulatory or nerve conditions, should consult a qualified practitioner before adding any new point practice. None of these rules is unique to Tiaokou; they are the ordinary courtesies the body asks of every point.
And the wider rule stands over everything: this page is educational, and acupressure is self-care, not diagnosis or therapy. Seek prompt medical care — not a pressure routine — for one-sided calf swelling, redness, or pain, especially after long travel, bed rest, or surgery; for numbness or weakness that spreads or worsens; for breathlessness arriving alongside calf complaints; or for any symptom that frightens you. Such signals can mark matters that self-care can neither see nor address. Persistent complaints belong with a licensed practitioner, medical or East Asian medical as suits the problem. The slender opening offers most people a quieter gift: a better acquaintance with their own hardworking shins, treated kindly.
Tiaokou, the Slender Opening, sits halfway down the outer front of the shin, midway between the crease behind the knee and the outer ankle bone, on the stomach channel’s long walk toward the second toe. Classical practice reached here for weak, numb, or cramping legs — and, more surprisingly, for aching shoulders and arms. This guide walks through finding it by touch and pressing it gently.
Self-care limits
Frequently asked
- How do I find Tiaokou without knowing anything about cun?
- Use the halfway rule. Find the crease behind your knee and the tip of the bone on the outside of your ankle; the point sits about midway between them. Come forward around the shin onto its front-outer slope, locate the sharp ridge running down the front of the bone, and step one finger-breadth outward into the flesh. Cun measurements simply write the same halfway-and-one-breadth recipe in proportional language.
- Why would a leg point have anything to do with shoulder pain?
- Through classical reasoning rather than anatomy charts. The tradition groups the stomach and large intestine systems together as the two yangming channels and imagined same-family channels answering one another across the body; the large intestine channel happens to climb the arm and cross the shoulder. A distant leg point on its foot-side partner therefore entered classical discussions of shoulder complaints. It is framework, documented for understanding — not a promise that pressing the shin eases a shoulder.
- Is pressing Tiaokou myself actually safe?
- For healthy adults, gentle fingertip pressure on the surface is generally reasonable self-care. The licensed dataset records no specific caution for this point, and the outer shin is well padded compared with the chest or abdomen. The general rules still bind: light pressure only, nothing over broken skin, immediate stopping on sharp or radiating sensation, and professional consultation beforehand for anyone pregnant or managing circulatory or nerve conditions.
- What did classical practice use Tiaokou for?
- The record lists atrophy and paralysis of the lower limb, cramps, shoulder and arm pain, epigastric and abdominal pain, and numbness of the foot. Classical teaching tied wasted or numb legs to the yangming systems’ role as nourishers of muscle and sinew, which made points along the stomach channel natural gathering places for such complaints. These are traditional frameworks recorded for context — not evidence-backed treatment claims.
- My legs feel weak and numb. Should I start with acupressure?
- No — start with assessment. New or worsening numbness, weakness, or swelling in a limb deserves professional evaluation promptly, because such symptoms can signal matters acupressure can neither see nor address. Once a clinician has ruled out anything urgent and cleared ordinary activity, gentle self-care can sit alongside daily life like any comfortable routine. Self-acupressure lives downstairs in comfort; diagnosis lives upstairs in the consulting room, and the stairs run upward only through qualified hands.
Sources
- 01WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008), World Health Organization — nomenclature conventions.
- 02A Manual of Acupuncture, Peter Deadman, Mazin Al-Khafaji and Kevin Baker — point-name tradition and channel context.
- 03aijiu-mpvue (MIT License) licensed dataset, entry for ST38 Tiaokou — location, actions, and indication record.
Last reviewed
牌記This leaf, for machines
Old books ended with a colophon saying who printed them. Every leaf here carries the same facts as structured data for agents and search, with no layout in the way.
- GET /en/points/st38/leaf.json
- GET /zh-hant/points/st38/leaf.json
- GET /zh-cn/points/st38/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "ST38",
"name": {
"en": "Tiaokou",
"gloss": "Slender Opening",
"zh-Hant": "條口",
"zh-Hans": "条口"
},
"channel": {
"id": "ST",
"order": 38,
"of": 45
},
"location": {
"text": "Halfway between the outer knee hollow and the outer ankle bone, one finger out from the shin."
},
"for": [
"calf cramps",
"shoulder ache",
"numb feet"
],
"press": {
"text": "Firm thumb pressure, about a minute each leg.",
"seconds": 60,
"sides": "both"
},
"cautions": [],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/st38",
"lastReviewed": "2026-08-24"
}