On blood-thinning medicine, ask a clinician first.
三陽絡 Sanyangluo
“Three Yang Connection” · TH8
Hand Shaoyang · 8 of 23
Where. About five finger-widths above the back wrist crease, between the two forearm bones.
For. Toothache; aching arm; a common cold.
Press. A light touch on the skin, not into the groove, about a minute each arm.
Caution. On blood-thinning medicine, ask a clinician first.
三陽絡，在臂上大交脈，支溝上一寸按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Sanyangluo Sits on the Forearm
Lay a palm face down and look at the back of your own forearm: two bones run side by side from wrist to elbow, and between them lies a soft corridor of muscle and connective tissue. The dataset places Sanyangluo on that dorsal aspect, four cun above the dorsal transverse wrist crease, between the radius and the ulna. A cun is the traditional measuring unit of Chinese point-location: proportional lengths taken from the person being examined rather than from a ruler, with the width of your own thumb at its knuckle serving as the everyday approximation. Four cun therefore means stepping four thumb-widths up the back of the forearm from the crease at the wrist — and “above” always means toward the elbow, never toward the hand.
The two named bones deserve a moment of attention. The radius sits on the thumb side of the forearm, the ulna on the little-finger side; close to the wrist the two draw near each other, and travelling upward the corridor between them gradually opens out. At the height of this point a fingertip settles plainly into the soft tissue between the two bony ridges, with solid bone rising on either side. That two-hard-one-soft feel is the locator’s best companion: if you are balanced on a bare ridge, or sunk into muscle with no bone within reach on either side, you are not yet between anything.
This stretch of the channel reads like a ladder. Its nearest neighbour below, Huizong (TH7), is recorded three cun above the same wrist crease — one cun closer to the hand — and further stations continue upward toward the elbow. The full channel carries twenty-three points, beginning at the ring finger and climbing the outer arm all the way to the temple at the side of the head, and this station sits squarely on the mid-climb. Knowing the ladder helps twice over: it confirms you counted correctly, and it explains why so many neighbouring names share the same dorsal-forearm address.
A Self-Palpation Walkthrough
Sit upright at a table and lay the forearm face down, wrist and fingers relaxed. First find the dorsal wrist crease — the line that appears across the back of the wrist when you gently bend the hand backward. Place the thumb of your other hand at the middle of that crease, then walk it four thumb-widths up the back of the forearm toward the elbow. Let your fingertips settle into the soft middle ground between the two bones and press lightly until you feel the faintest give between the ridges: that is the spot. Nothing in the search needs force; patience accomplishes what a hard press cannot.
A few confirmations help before any real pressing begins. Touch feather-light and compare nearby spots: most people notice a faint, dull awareness at the true point and little sensation a finger-width away. Then wiggle your fingers gently — the tissue under a correct placement shifts and slides with the movement, telling you the fingertip rests among working muscles rather than on bare bone. Finally check sideways: the spot should sit clearly off both bony edges, in the soft middle ground the location describes, not crowding either ridge.
Three classic mistakes account for most missed finds. Measuring from the crease on the palm side instead of the back of the wrist starts the whole search in the wrong landscape; sliding onto a bony ridge leaves you on bare bone; and under-counting the thumb-widths lands you low among the crowded points near the wrist. When in doubt, return to the dorsal crease, start over, and count slowly once. The landmarks repeat themselves faithfully every single time.
Reading the Name: Three Yang Connection
The three characters each carry weight. San 三 means three. Yang 陽 names the bright, active principle — and by extension the outward-facing aspects of the body along which the yang channels travel. Luo 絡 means a net, a web, to connect: the same character that closes the word jingluo, the meridian network itself. Read together, Sanyangluo is the three-yang connection — a name born with traffic imagery built in, describing a junction where ways meet rather than a destination at the end of one road.
A long-standing traditional reading takes the name at its word: this is where the qi of the hand’s three yang channels — those of the large intestine, the small intestine, and the triple burner — communicates and interweaves. Worth noting alongside: the licensed record assigns this point no special classical category, unlike its neighbour Huizong (TH7), which the record notes as a xi-cleft point. The name itself does the identity work instead — a meeting-ground, a crossing of ways — which suits a point whose whole story is about connection.
Pinyin renders the name Sānyángluò: san carries a flat, high first tone; yang a rising second tone; luo a crisp falling fourth tone. The hanzi 三陽絡 are simple enough to take in at a glance. Where many channel points borrow architecture — gates, valleys, courtyards, storehouses — this one borrows a net, and the metaphor does real work: it says the tradition treated this spot as a node where roads cross, not a lone way-station on a single line.
Traditional Indications, Explained
The licensed record lists six traditional indications: sudden loss of speech, deafness, toothache, painful obstruction of the upper limb, common cold, and aphasia after stroke. Read in their own idiom: painful obstruction translates the classical concept of bi — the ache, heaviness, stiffness, and numbness attributed to qi and blood failing to move freely, here gathered on the arm. The common cold belonged in classical framing to exterior invasion, and exterior complaints were traditionally met at points along the yang channels of the limbs, where the body’s surface meets the world.
Why should an arm point reach the ears and the teeth? The channel map answers: the recorded course of the san jiao channel runs from the ring finger up the outer arm to the temple at the side of the head. Classical practice reasoned along these routes — complaints arising near a channel’s far end were traditionally addressed at stations along the path, a habit known as following the channel to choose distant points. Speech disorders entered this point’s historic portfolio through the same channel-minded logic, preserved in the old records as they were written down. These remain traditional frameworks for understanding the body, offered for context rather than as claims.
It bears repeating plainly: these are the traditional uses recorded in a licensed dataset and classical literature, presented for cultural and historical understanding. They are not claims that pressing this point treats disease, and nothing here 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. One entry demands special emphasis: anything stroke-shaped — sudden loss of speech included — belongs to emergency medicine first, a matter the safety section below takes up in full.
Self-Care Acupressure at Home
With the point found by the walkthrough above, settle in: seated, forearm resting face down, shoulders heavy. Curl the index and middle fingers together and rest the pads — never the tips — on the spot. Begin with contact alone for a few breaths, then add small, slow circles, letting the skin glide over the tissue beneath rather than grinding against the bone. 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. Swap hands and repeat on the other side, keeping sessions symmetrical.
Quality matters more than duration, and here quality has a specific meaning: because the licensed record warns that important vessels and nerves lie deep to this point, the whole intention of home practice stays superficial. Let the fingertips ride on the skin rather than boring into the groove between the bones. Warm cold hands first, since chilled muscle guards; choose a quiet corner over a screen, letting the practice double as a breathing pause; anchor it to an existing habit — morning washing, an afternoon stretch — 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. Across weeks you may notice the area feels less guarded, or that the whole forearm feels easier while you press, or simply that you spent a few unhurried minutes attending to your own body. Every one of those outcomes fits the honest scope of self-acupressure. What does not fit is escalation — harder, longer, deeper, to force a result. When curiosity pulls that way, return to gentleness, or stop for the day.
Cautions and Safe Practice
This point earns more respect than most, and the reason is written plainly in the licensed record. The dataset cautions practitioners against deep needling here, because important vessels and nerves lie deep to the point. The warning follows from simple geography: the soft corridor between the two forearm bones is exactly the kind of passageway through which vessels and nerves travel. Professional training manages the risk with precise technique; home self-care manages it differently and far more simply — by never leaving the surface at all. Gentle fingertip work on skin and superficial muscle stays safely remote from the structures the caution protects.
The practical rules follow from that picture. Use finger pads only — never elbows, knuckles, or tools — and keep pressure light enough to feel like touch with intent, not excavation. Sharp, electric, or radiating sensation means stop at once and leave the area alone for the rest of the day; such feelings are the body’s border alarm, and home practice honours it absolutely. Skip the point over broken, irritated, or numbed skin, and pause the practice through any acute arm injury. Readers taking blood-thinning medication do well to ask a clinician before adding pressure practices, because even gentle pressure can mark the skin; anyone recovering from forearm injury or surgery should clear new practices with their clinician first, and pregnant readers — as well as readers living with chronic neurological conditions — do well to consult a qualified practitioner before adding any new point work.
And the wider rules stand over everything. Sudden trouble speaking, a drooping face, weakness or numbness down one side, a sudden severe headache — these call emergency services immediately, with no time spent on pressure points; the classical listings around speech reflect a different century’s emergency kit, and today’s emergencies belong to today’s medicine. Persistent numbness, weakness, or unexplained swelling of the arm belongs with a licensed clinician promptly. Beyond that, this page is educational only, acupressure is self-care rather than diagnosis or therapy, and persistent symptoms of any kind belong with a licensed practitioner. The safest thing Sanyangluo offers most people is a better acquaintance with their own forearm, treated kindly.
Sanyangluo, the Three Yang Connection, rests on the back of the forearm in the soft corridor between the two forearm bones. Classical practice reached for it when voice failed suddenly, the ears rang, or aches settled into the arm. This guide walks through finding it by touch, pressing it gently, and the safety lines that matter most here.
Cautions from the classical sources
- Keep insertion shallow; important vessels and nerves lie beneath this point.
Self-care limits
Frequently asked
- How do I find Sanyangluo without knowing anything about cun?
- Let your thumb be the ruler. Lay the forearm face down, find the middle of the crease across the back of the wrist, then step four thumb-widths up toward the elbow. Settle your fingertips into the softest gap between the two forearm bones at that height and you are standing where the dataset describes. Cun measurements simply encode the same landmark sequence in proportional language.
- Is pressing Sanyangluo myself actually safe?
- Gentle fingertip pressure held on the surface is generally reasonable self-care for healthy adults, because it engages skin and superficial muscle far short of the important vessels and nerves the licensed record warns sit deep to this point. The recorded danger concerns techniques that reach inward — a category home acupressure never approaches. Respect the stop signals: sharp pain, electric or radiating sensation, or discomfort that worsens all mean finish immediately.
- What did classical practice use Sanyangluo for?
- The traditional record lists six indications: sudden loss of speech, deafness, toothache, painful obstruction of the upper limb, common cold, and aphasia after stroke. Classical theory explained the reach from an arm point through the channel’s course up toward the head. Those are traditional frameworks for understanding the body, documented for context — not evidence-backed treatment claims — and the stroke-related entries belong to emergency medicine today.
- Why would a forearm point serve the ears and teeth?
- That is the classical habit of choosing distant points along a channel. The san jiao channel runs from the ring finger up the outer arm to the temple, and practice reasoned that complaints near the route’s far end could be met at stations along the way. Modern readers need not accept it as physiology; it is best understood as an old and coherent map of connections, drawn long before modern anatomy.
- If someone suddenly loses their speech, should I press this point?
- No — absolutely not. Sudden speech difficulty can signal a stroke, and the only correct response is to call emergency services at once; every minute matters, and time spent pressing points is time lost. The classical listing reflects a historical emergency context that cannot transfer to modern medicine. Once professional care has taken over, every decision about recovery belongs with the medical team.
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 TH8 Sanyangluo — 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/th8/leaf.json
- GET /zh-hant/points/th8/leaf.json
- GET /zh-cn/points/th8/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "TH8",
"name": {
"en": "Sanyangluo",
"gloss": "Three Yang Connection",
"zh-Hant": "三陽絡",
"zh-Hans": "三阳络"
},
"channel": {
"id": "TH",
"order": 8,
"of": 23
},
"location": {
"text": "About five finger-widths above the back wrist crease, between the two forearm bones."
},
"for": [
"toothache",
"aching arm",
"a common cold"
],
"press": {
"text": "A light touch on the skin, not into the groove, about a minute each arm.",
"seconds": 60,
"sides": "both"
},
"cautions": [
"On blood-thinning medicine, ask a clinician first."
],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/th8",
"lastReviewed": "2026-08-24"
}