陽綱 Yanggang
“Yang’s Guiding Cord” · BL48
Foot Taiyang · 48 of 67
Where. Three bumps below the shoulder-blade tips (below the tenth bump from C7), four finger-widths from the spine.
For. A rumbling, aching belly; loose stools.
Press. Ask a partner to press with a thumb, or lean on a soft ball against a wall, a minute.
陽綱，在第十椎下，兩傍各三寸陷者中按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Yanggang Sits on the Back
The dataset places Yanggang on the back, below the spinous process of the tenth thoracic vertebra, three cun lateral to the posterior midline. Unpacked: draw a fingertip down the centre of the back and every knobbly bump beneath the skin is the tip of a spinous process; the tenth such bump belonging to the thoracic — chest-region — vertebrae fixes the vertical coordinate. The horizontal coordinate repeats the body-as-ruler trick: a cun is the traditional unit taken from the proportions of the person being examined, not from any external ruler, and three cun across an adult back comes out close to the width of the four fingers held together. The point therefore sits a deliberate distance clear of the spinal groove, out where the back grows fleshy toward the flank.
What lies beneath deserves a respectful pause before any touch begins. By this level the great cape of the trapezius muscle has thinned away, and the layers under the skin are chiefly the broad sheet of the latissimus dorsi and the long cords of the erector spinae that climb beside the spine. Deeper still, the ribs curve around toward the front of the trunk, sheltering the organs of the upper abdomen. On the right side the liver rides high within that rib shield, reaching upward as far as the lower chest; the other upper-abdominal organs gather at much the same depth, forward of the spine. The dataset warns practitioners not to needle this point deeply, because over-deep insertion may injure the liver — and behind that sentence stands exactly this geography: the organs lie closer to the surface than a thick-muscled back suggests.
Yanggang belongs to the second, outer line of the bladder channel on the back. Classical location teaching describes the channel laying down twin lines beside the spine — an inner line about a cun and a half from the midline, and this outer one at three cun — with the two rows of points facing each other like doorways across a street, matched segment by segment. The classical record describes the gallbladder’s back-shu point standing on the inner line at this very level, with Yanggang as its outer-line companion. Read as a way of thinking rather than a piece of anatomy, the pairing says something characteristic: each segment of the spine was treated as a hub for one theme of the trunk, and the outer line held that hub’s supporting offices.
A Self-Palpation Walkthrough
Sit with both feet supported and shoulders released, exposing the back if the room is warm enough. The dependable starting peg is at the base of the neck: bow the head and the bump that rises most prominently there is the spinous process of the seventh cervical vertebra, the last of the neck. From it, walk fingertips down the midline counting each spinous process in turn — the tenth below that peg belongs to the tenth thoracic vertebra, and the target level lies just beneath it. Bodies differ at the surface, so location teaching keeps a cross-check ready: the lower corner of the shoulder blade is commonly used as a marker sitting near the seventh thoracic level, roughly two-thirds of the way up the stretch being counted. Count twice, slowly, and trust the tally only when both passes agree.
With the level fixed, measure outward. Hold the four fingers together and lay their combined width along the back from the midline at that level: on most adult frames that span approximates the three cun the record calls for. The fingertip now rests in the zone where firm muscle meets the softer flank — a shallow corridor of tissue rather than a dramatic hollow. Touch feather-light and compare sides: many people notice a faint, dull awareness at the true point and almost nothing a thumb-width away. If what meets the finger is bare bone edge or nothing but dense muscle belly, slide a fraction and search again patiently; the point announces itself to persistence, never to pressure.
Honesty first: reaching one’s own mid-back is genuinely awkward, and nobody should contort to prove otherwise. With a partner it is simple — sit relaxed, let them follow the steps above, and describe what you feel. Alone, reach across with the opposite hand — right palm to the left side of the back, left palm to the right — keeping the wrist natural rather than twisted. And if the count of vertebrae goes fuzzy midway, or the surface landmarks refuse to resolve, the honest moves are to ask for help, to work the whole outer line gently with a flat palm without claiming any exact address, or simply to save the precise version for another day. The back rewards patience and forgets force.
Reading the Name: Yang’s Guiding Cord
Two characters sketch the point’s office. Yang 陽 is the bright, active principle — the sunny face of a slope, warmth, movement, the rising and spreading aspect of the body’s activity. Gang 綱 is an older, earthier word: the stout head-rope fastened along the edge of a fishing net, the rope by which the whole web is gathered, lifted, and held in shape — hence its extended senses of mainstay, guiding principle, the outline that holds a thing together. Joined, Yanggang reads as the cord that gathers and governs yang: the place where the body’s bright, moving quality is collected, ordered, and kept true, the way a head-rope turns loose mesh into a workable net.
That imagery suits the point’s recorded temperament. The bladder channel is counted the longest of the classical channels, running from the inner corner of the eye up over the head and down the entire back to the little toe, and along the back its two parallel lines carry a long register of segment-by-segment correspondences for the trunk’s workings. At this level those correspondences gather around digestion — the same vertebral band whose inner-line point the classical commentaries connect with the gallbladder. A name about ordering and gathering yang, set at a station where tradition discussed unruly bowels and disturbed fluids, is the tradition speaking in its own poetic shorthand: things that should rise and spread have fallen into disorder below, and this station holds their organising rope.
Pinyin renders the name Yánggāng: a rising second tone on yang, then a high, level first tone on gang. The hanzi pair 陽綱 sets the commonest character in point-naming beside a comparatively rare one, and the pairing earns its place. Where so many neighboring points take their metaphors from dwellings — gates, valleys, courtyards, storehouses — this one borrows from rigging: the hardware that holds shape under load. It is a quietly practical image for a mid-back point asked to stand steady through the trunk’s busiest traffic.
Traditional Indications, Explained
The dataset’s recorded indications read: borborygmus and abdominal pain, diarrhoea, dysentery, jaundice, and wasting-thirst disorder. Borborygmus is the record’s dignified term for what everyone knows colloquially — the audible gurgles and rumbles of a bowel at work. In the old texts such sounds could be mere plumbing, but they could also be read as qi and fluid moving unrulily through the intestines. Abdominal pain in these lists usually means diffuse, dull, cramping unease across the belly rather than sudden surgical agony. Diarrhoea needs little translation; classical entries distinguish an unsettled day from chronic, draining patterns, and the tradition treated the distinction seriously.
The remaining three entries deserve honest translation. Dysentery, in the old records, named frequent small stools with mucus or blood, often with griping and fever — a category modern medicine now divides among infections and inflammatory diseases, nearly all of which call promptly for medical assessment rather than self-management. Jaundice — yellowing of the skin and the whites of the eyes — was read traditionally through dampness and disorder between the spleen and gallbladder; today it is a sign that always warrants clinical evaluation. Wasting-thirst disorder, xiaoke, was the classical umbrella for relentless thirst, hunger, copious urination, and weight loss, under which presentations recognisable today as diabetes-like were described. Read honestly, these categories are history: rich windows into how the tradition saw the body, not invitations to nurse serious illness at home.
It bears repeating plainly: these five entries are the traditional portfolio recorded in a licensed dataset and classical literature, offered here for cultural and historical understanding. They are not claims that pressing this point treats any condition, and nothing in this guide replaces assessment by a qualified clinician. Where modern research touches self-applied pressure at all, reviews suggest effects are modest and context-dependent, and evidence specific to any single point remains thin. Hold the tradition lightly, and hold the safety rules firmly.
Self-Care Acupressure at Home
Once the station is confidently located — by your own fingers or a partner’s — settle in: seated with feet supported and spine tall but unforced, reaching across with the opposite hand. Use the pads of the fingers, never the tips, knuckles, elbows, or any tool. Begin with contact alone for several unhurried breaths, letting the tissues grow accustomed to the presence of your hand; then add small, slow circles, letting the skin glide over the muscle beneath rather than dragging against it. Aim for a pleasant, spreading dullness — warmth, mild ache — and treat anything sharp, electric, or radiating as an immediate stop sign. If lying down suits better, a partner can work while you rest face-down with the head turned comfortably aside.
A common home rhythm is one to three minutes per side, once or twice daily, paired with slow exhales so that each circle rides the breath out. Keep the two sides symmetrical, and prefer frequency over force: light, patient, regularly repeated contact is the register this page practises, and it should cost nothing in tomorrow’s soreness. Warm cold hands first, because chilled muscle guards itself. Choose a quiet corner over a screen, and let the session double as a genuine pause — many people find the mid-back softens simply from breathing slowly for ninety seconds, with or without a precise address. That softening is not a prize to chase; it is the ordinary language of tissue relaxing under kind attention.
Treat the exercise as attendance rather than intervention. Across weeks you might notice the area feeling less guarded, your posture settling, or nothing beyond the pleasure of a regular minute of quiet — all of these fall inside the honest scope of self-care. What falls outside it is escalation: pressing harder, longer, or deeper to force a result, or continuing through pain because a goal seems close. When curiosity pulls toward force, return to gentleness or close the session for the day. The point has waited centuries; it does not need your impatience.
Cautions and Safe Practice
This point carries a caution worth reading twice. The licensed dataset warns practitioners not to needle Yanggang deeply, because over-deep insertion may injure the liver — and behind that sentence stands the geography sketched earlier: organs riding close beneath the lower ribcage zone, nearer the surface than a thick-muscled back admits. Professional education manages that risk with trained technique; home self-care manages it differently and more simply, by staying entirely on the surface. Light fingertip pressure engages skin and the outer layer of muscle, far short of the structures the caution protects. Here the distance between safe and unsafe is measured in intent as much as in millimeters: gentleness is the entire safety system.
For home practice the rules are few and firm. Pressure stays light and strictly superficial; no tools, devices, knuckles, or elbows. Skip the point entirely during feverish or acute illness, over broken or irritated skin, and while any back injury, significant strain, or surgical healing remains unsettled — resume only once ordinary activity has been cleared. Sharp, electric, or radiating sensation means stop at once and leave the point alone for the day. Pregnant readers, and anyone living with liver disease, gallbladder disease, a diagnosed digestive condition, or anything that slows healing, should consult a qualified practitioner before adding any new point practice. The conservative default costs nothing and closes no doors.
And above everything stands the wider rule: this page is educational, and acupressure is self-care, never diagnosis or therapy. Diarrhoea persisting beyond a couple of days, blood in the stool or stools that look black and tarry, fever alongside digestive upset, persistent vomiting, yellowing of the skin or eyes, unexplained weight loss, or severe abdominal pain — each belongs promptly with a doctor, not with a pressure routine. Even without such flags, complaints that linger deserve a licensed professional’s assessment sooner rather than later. The guiding cord of yang is a beautiful image; the practical gift of this page is knowing where the image ends and medical care begins.
Yanggang — Yang’s Guiding Cord — stands on the outer line of the bladder channel midway down the back, beside the lower rib-bearing spine. Classical practice reached for it when digestion rebelled: borborygmus and abdominal pain, diarrhoea, dysentery, jaundice, and old wasting-thirst all appear in its portfolio. This guide covers locating it, gentle touch, and honouring the caution it carries.
Cautions from the classical sources
- Keep insertion shallow; going too deep can damage the liver.
Self-care limits
Frequently asked
- How can I find the tenth thoracic vertebra without anatomy training?
- Bow your head and use the prominent bump at the base of the neck as your starting peg, then count spinous processes downward — the tenth below the peg sets the level, with the lower corner of the shoulder blade as a rough cross-check near the seventh thoracic. Count twice and act only when both tallies agree. If the count goes fuzzy or the landmarks feel ambiguous, do not guess: ask a partner to help, work the whole outer line gently with a flat palm instead, or save the precise version for another day.
- Is it really safe to press a point that sits over organs?
- Gentle fingertip pressure stays in skin and superficial muscle — a very different world from the deep professional techniques the dataset caution addresses. The recorded risk of liver injury concerns over-deep insertion by trained hands, a category home acupressure never approaches. What remains true at any depth is the etiquette of stop signals: sharp, electric, or radiating sensation means finishing immediately, and any lingering doubt about your own anatomy is sound reason to choose an easier point altogether.
- What did classical practice use Yanggang for?
- The traditional record lists borborygmus and abdominal pain, diarrhoea, dysentery, jaundice, and wasting-thirst disorder — essentially a digestive portfolio, read by the tradition as disorder of fluids and movement in the intestines. Its role as the gathering cord of yang, seated across the street from the gallbladder’s back-shu point, kept it part of this segment’s conversation in the classical literature. Those are frameworks for understanding the body, documented for cultural context — not evidence-backed treatment claims.
- Why does a mid-back point belong in conversations about digestion?
- Classical channel theory treats the bladder channel’s two lines along the back as a long switchboard of correspondences, segment by segment, for the workings of the trunk — the inner line carrying the primary stations and the outer line their companions. At the tenth thoracic level those correspondences gather around the digestive organs, which is why Yanggang recurs in traditional discussions of rumbling bowels, loose stool, and jaundice. The reasoning belongs to the tradition’s own correspondence map, not to modern physiology — and it interests precisely as a different way of seeing the body.
- When should I stop pressing and see a clinician?
- At the first hint of anything serious: blood in the stool, black tarry stools, fever, persistent vomiting, diarrhoea outlasting a couple of days, yellowing of skin or eyes, unexplained weight loss, or severe abdominal pain. None of these yield to self-care, and delay narrows the options available to you. Think of acupressure as the ground floor — daily comfort and attention — and clinical medicine as the floor you visit promptly whenever symptoms persist, worsen, or frighten you. Neither substitutes for the other.
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 BL48 Yanggang — location, actions, and caution 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/bl48/leaf.json
- GET /zh-hant/points/bl48/leaf.json
- GET /zh-cn/points/bl48/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "BL48",
"name": {
"en": "Yanggang",
"gloss": "Yang’s Guiding Cord",
"zh-Hant": "陽綱",
"zh-Hans": "阳纲"
},
"channel": {
"id": "BL",
"order": 48,
"of": 67
},
"location": {
"text": "Three bumps below the shoulder-blade tips (below the tenth bump from C7), four finger-widths from the spine."
},
"for": [
"A rumbling",
"aching belly",
"loose stools"
],
"press": {
"text": "Ask a partner to press with a thumb, or lean on a soft ball against a wall, a minute.",
"seconds": 60
},
"cautions": [],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/bl48",
"lastReviewed": "2026-08-24"
}