腕骨 Wangu
“Wrist Bone” · SI4
Hand Taiyang · 4 of 19 · yuan-source
Where. On the outer edge of the hand, in the dip between the end of the little-finger hand bone and the wrist bones.
For. Wrist pain, cramping fingers, a stiff neck.
Press. Hold between thumb and index pads, slow circles, one minute each hand.
腕骨，在手外側腕前，起骨下陷者中按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Wangu Sits on the Hand
Hold your hand up, palm turned halfway toward you, and look at the outer edge below the little finger. Two structures meet there and their meeting defines the point. One is the fifth metacarpal — the long bone seated inside the little finger, running from the knuckle back toward the wrist — and its base is the slightly widened, wristward end of that bone, the opposite end from the knuckle. The other is the hamate, one of the cluster of small bones that build the wrist itself, sitting on the little-finger side of that cluster. The dataset places Wangu on the ulnar side of the palm, in the depression between the base of the fifth metacarpal bone and the hamate bone, at the junction of the red and white skin. In plain terms: find the shallow hollow right where the hand’s long bones hand off to the wrist’s short ones, and you are standing on the point’s doorstep.
The closing phrase of that location deserves its own explanation, because it is one of the tradition’s most reusable landmarks. The junction of the red and white skin — hong-bai rou-ji in Chinese — names the visible border where the palm-side skin, thick, cushioned, and hairless, gives way to the thinner, looser skin of the back of the hand. On most hands the change runs in a clean line along the edge of the palm, easiest to see where the skin bends. Classical locators loved borders like this because they cannot be miscounted: unlike measured distances, which scale differently on every body, a boundary between two kinds of skin sits exactly where it sits, on everyone. When a location ends with this phrase, it is telling you the point lives on that dividing line, neither deep in the palm nor out on the flat of the hand’s back.
Neighboring points bracket the spot and help confirm it. Toward the fingers, in the groove just behind the little finger’s knuckle, sits Houxi (SI3), found with the fist loosely closed; toward the wrist, in the hollow beside the ulna’s rounded styloid process, sits Yanggu (SI5). Wangu holds the middle ground between them, exactly at the transition from hand to wrist. This stretch belongs to the opening run of the small intestine channel, whose mapped course starts at the little finger and travels up the little-finger side of the hand and forearm, onward over the shoulder region, until it reaches the face — nineteen points in all, and several of them crowd together in the few centimeters around this hollow.
A Self-Palpation Walkthrough
Sit comfortably and let the hand go completely soft, resting palm down on a table or thigh. Start from something unmistakable: the knuckle at the base of the little finger. Lay the pad of your opposite thumb just behind that knuckle, on the little-finger edge of the hand, then slide slowly toward the wrist along the border where palm skin meets back-of-hand skin. You will feel the long bone of the little finger under your thumb rise, near its far end, into a smooth rounded bump — that bump is the base of the fifth metacarpal. Move just beyond the bump, toward the wrist, and the surface falls away into a shallow hollow before the firmer ridge of the wrist bones begins. Settle your fingertip in that hollow, keeping it on the red-and-white border line. That is Wangu.
Three quiet confirmations help before any pressing begins. First, compare sides: touch feather-light on both hands and notice whether a faint, dull awareness gathers under one fingertip while the matching spot stays silent — the two sides often differ slightly, and that asymmetry is normal. Second, move the wrist: flex and extend it gently and watch the hollow deepen and flatten under your finger, confirming you are resting in the joint neighbourhood rather than on solid bone shaft. Third, curl the fingers into a loose fist and release them; the bump beside the hollow should become more prominent as the tendons gather, then soften again. If everything feels flat everywhere, give or take half a thumb-width around your current spot and search again patiently rather than pressing harder.
The usual mistakes are easy to name. Stopping too early leaves you in the groove behind the little finger’s knuckle — that is Houxi’s address, one knuckle-segment away. Sliding too far carries you across the wrist crease into Yanggu’s territory beside the forearm bone. Pressing inward, off the edge and into the padded centre of the palm, lands you on soft tissue that was never part of the location. Whenever the search loses its way, return to the starting ritual — knuckle, slide, bump, hollow — and begin again calmly. The landmarks are reliable; they simply ask to be followed in order, at the pace of curiosity rather than the pace of impatience.
Reading the Name: Wrist Bone
Some point names reach for poetry — valleys, courtyards, gates — and some simply point at the ground. Wangu is the second kind. Wan 腕 means the wrist; gu 骨 means bone; joined, the name reads Wrist Bone. It is also, fittingly, the traditional anatomical term for the collection of small bones that make up the wrist itself, so the name works on two levels at once: it labels the terrain, and it marks the spot where that terrain is easiest to address. Classical texts place the point squarely in the bony crowd where the hand’s long bones meet the wrist’s short ones, and the prominence felt at the base of the little-finger bone gave the location its label. Among all the metaphorical architecture of channel nomenclature, this one is the honest surveyor’s marker.
The name may be plain, but the office the point holds is not. Classical teaching assigns each of the twelve principal channels a yuan-source point — a place where the qi of that channel is understood to pool closest to the surface, something like the residence where a household keeps its seal. Wangu holds this post for the small intestine channel, and such ranks traditionally carried weight: a source point entered discussion whenever anything along its whole route needed attention, from the fingers it stands among to the neck and face the channel climbs toward. The pairing runs deeper still in the old framework, where the small intestine works as the heart’s exterior partner and the pair belongs to the fire element — context recorded in this site’s own registry, offered as tradition rather than physiology.
Pinyin renders the name Wàngǔ: wan spoken on a falling fourth tone, gu on a dipping third tone that starts low, sinks further, then rises again — say wan firmly downward, and gu as if voicing mild doubt. The hanzi pair 腕骨 is compact enough to memorise at a glance, and the image repays attention every time the fingertip settles into the hollow: you are visiting the place where the hand’s architecture changes materials, long bone yielding to pebble-grained wrist. Names in this tradition are rarely decoration even when they are plain. This one compresses a location lesson into two syllables — feel for the bone, then for the seam between bones — and a beginner who remembers only the name still carries half the map.
Traditional Indications, Explained
The licensed record lists six traditional applications: spasm of the fingers and wrist pain; stiffness and pain of the head and neck; eye cloudiness; jaundice; febrile disease; and malaria. Read as a group rather than a pharmacy list, three clusters emerge. The first gathers the local territory — fingers that cramp and a wrist that aches — matching a point embedded in the hand’s working machinery of tendon and bone. The second gathers the regional territory — a stiff, painful neck, and clouded vision — corresponding to the channel’s mapped climb from the little finger up toward the face. The third holds the systemic entries: jaundice, febrile disease, and malaria, which classical medicine read through its own frameworks of heat, damp, and the body’s interior waters rather than through laboratory lenses.
Each cluster has its traditional logic. Because the point sits amid the little finger’s tendons, classical practice reached for it when the fingers seized or the wrist complained — the straightforward logic of treating a neighbourhood from within it. Because the channel surfaces at the face after climbing from the hand, stiffness of the neck and cloudiness of the eyes entered its portfolio: in the traditional map, points along a route were understood to speak for regions the route touched, so a hand-sized point could be discussed alongside a neck or an eye. The systemic trio reflects the yuan-source rank described above, since source points were consulted whenever a channel’s deeper business — fluids, heat, fevers — came up for review. Jaundice in particular belonged to the classical conversation about separating clear from turbid fluids, a duty the tradition assigned to the small intestine’s domain.
It bears repeating plainly what these entries are and are not. They are traditional uses recorded in a licensed dataset and classical literature, offered here for cultural and historical understanding — not claims that pressing this point treats disease. Several translate poorly into modern life without translation notes: yellowing of the skin or the whites of the eyes is today always a reason for prompt medical assessment, whatever the tradition once wrote; malaria is a diagnosed infection that belongs to medical treatment, not self-care; and a stiff neck arriving with fever or after injury needs professional eyes, not a pressure routine. Where modern research touches self-applied pressure at all, reviews suggest effects are modest and context-dependent, and evidence tied to any single point remains thin. Hold the tradition lightly, and hold the safety rules firmly.
Self-Care Acupressure at Home
With the hollow found by the walkthrough above, settle into position: seated, shoulders heavy, working hand relaxed palm-down on a table. Place the pad of your opposite thumb on the red-and-white border line at the hollow and let your index finger rest underneath against the other side of the hand’s edge, so the point is held between cushioned pads rather than poked at by a tip. Begin with contact alone for a few slow breaths, then add small, unhurried circles, letting the skin glide over the firm tissue beneath rather than grinding across bone. Pressure should register as a 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 treat both edges alike.
Quality matters more than duration, here as everywhere in self-care. Warm your hands before beginning — chilled fingers make the tissue guard — and keep fingernails trimmed so the pad, not the edge, meets the skin. No tools belong in this work: pointed devices and rollers concentrate force in ways fingertips were never meant to, and the recorded tradition assumes human touch on human skin. The hand being worked should stay soft throughout; a rigid hand turns pressure into friction. People who keep a routine usually anchor it to something already in the day — the laptop closed for lunch, tea steeping, the evening commute’s last minutes — because regularity, not intensity, is what home practice actually asks for. Two quiet minutes daily beat twenty bruising minutes monthly.
Treat the session as a pause with a purpose rather than a repair job. Notice what changes across weeks: perhaps the wrist feels less guarded while typing, perhaps the fingers unclench more readily, perhaps nothing shifts except that you spent ninety seconds attending to your own overworked hand. 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, or continuing through pain hoping persistence converts into benefit. The hand is a faithful reporter; when it complains louder under stronger pressure, the message is about the pressure, not about your resolve. When curiosity pulls toward force, return to gentleness, or set the practice down for the day.
Cautions and Safe Practice
An honest page begins with the state of the record: the licensed dataset registers no caution for this point. That blank is worth reading correctly. It is not a certificate of invulnerability; it is a note that nothing specific has been recorded against this location — no warning like the ones that shadow points near lungs, eyes, or major vessels. Part of the reason is geography: the hollow lies padded by muscle and tendon over solid bone, far from organs, airways, and delicate membranes, which is precisely why the hand hosts so many of the tradition’s favourite self-care points. Forgiving terrain still asks for gentle hands. The absence of a written warning transfers responsibility to the reader rather than removing it, and everything below follows from that transfer.
The practical limits keep the practice inside its honest envelope. Skip the point entirely whenever the skin over it is cut, abraded, blistered, or inflamed, and while any skin condition there is active. Pause after recent wrist or hand injury, sprain, or surgery until ordinary use is cleared by whoever is supervising recovery, and during feverish illness. Readers living with diabetes, reduced sensation, poor circulation, or clotting conditions do well to ask a clinician before adding pressure practices, because hands that cannot report pressure faithfully can be pressed past their own limits unknowingly. Pregnant readers should consult a qualified practitioner before adding any new point work. During every session, sharp, electric, or radiating sensation means stop at once and do not try again that day; numbness or an ache lingering afterward means the pressure exceeded what the tissue welcomed.
And the wider rule stands over everything: this page is educational, and acupressure is self-care, not diagnosis or therapy. Seek prompt medical attention — not a longer pressing session — for a wrist deformed or badly swollen after a fall, fingers or wrist that will not move, numbness spreading up the arm, a severe or worsening headache, fever together with a stiff neck, or yellowing of the skin or eyes. Those are not indications; they are alarms. Persistent symptoms belong with a licensed practitioner — Western medicine or East Asian medicine, whichever suits the complaint. The safest thing Wangu offers most people is not a treatment at all: it is a finer acquaintance with the small architecture of their own hands, met kindly and pressed gently.
Wangu, the Wrist Bone, sits in a shallow hollow on the little-finger side of the palm where the long bone of the little finger hands off to the small bones of the wrist. Classical practice reached for it when wrists and fingers complained, when necks stiffened, and amid patterns of heat and fever. This guide walks you to the hollow by touch and shows how to press it gently.
Self-care limits
Frequently asked
- How do I find Wangu without knowing anything about cun?
- Easily — this is one of the friendliest locations in the catalogue, because its recorded description uses no cun measurements at all, only bones and a skin border. Slide from the little finger’s knuckle toward the wrist along the palm-edge line, feel the long bone rise into a rounded bump near its far end, then settle into the shallow hollow just beyond the bump, on the border where palm skin meets back-of-hand skin. Bones do the measuring for you.
- Is pressing Wangu myself actually safe?
- For healthy adults, gentle fingertip pressure on the surface is generally reasonable self-care: the point sits in padded tissue over solid bone, far from lungs, organs, and major vessels, and home acupressure stays strictly superficial. The licensed record registers no caution for this location, though absence of a warning is not license for force. Respect the stop signals: sharp pain, electric or radiating sensation, or discomfort that worsens all mean finish immediately.
- What did classical practice use Wangu for?
- The traditional record lists spasm of the fingers and wrist pain, stiffness and pain of the head and neck, eye cloudiness, jaundice, febrile disease, and malaria. Its status as the small intestine channel’s yuan-source point — where that channel’s qi was said to pool — helps explain why the portfolio spans both the local hand and distant regions the channel climbs toward. These are traditional frameworks for understanding the body, documented for context, not evidence-backed treatment claims.
- Why does a point on the hand get used for the neck and eyes?
- Classical channel theory draws the small intestine pathway starting at the little finger, climbing the little-finger side of the hand and forearm, crossing the elbow and shoulder region, and reaching the face. Within that map, points along a route were understood to speak for regions the route touched — the logic behind distal points generally, and behind this channel’s famous neck-and-shoulder reputation specifically. It is a traditional geography of the body, useful for understanding the records rather than a claim about modern anatomy.
- Can pressing Wangu replace seeing someone about my wrist pain?
- No. Self-acupressure is comfort practice, not diagnosis, and wrist pain carrying red flags — deformity or marked swelling after a fall, inability to move the wrist or fingers, numbness or tingling that persists or spreads, a joint that is hot and swollen — needs professional assessment promptly. Think of daily self-care and clinical care as different floors of the same building: the quiet routine lives downstairs, and the consulting rooms upstairs open exactly when symptoms persist, escalate, or frighten you. Neither floor 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, yuan-source theory, and channel context.
- 03aijiu-mpvue (MIT License) licensed dataset, entry for SI4 Wangu — location, point class, 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/si4/leaf.json
- GET /zh-hant/points/si4/leaf.json
- GET /zh-cn/points/si4/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "SI4",
"name": {
"en": "Wangu",
"gloss": "Wrist Bone",
"zh-Hant": "腕骨",
"zh-Hans": "腕骨"
},
"channel": {
"id": "SI",
"order": 4,
"of": 19
},
"location": {
"text": "On the outer edge of the hand, in the dip between the end of the little-finger hand bone and the wrist bones."
},
"for": [
"wrist pain",
"cramping fingers",
"a stiff neck"
],
"press": {
"text": "Hold between thumb and index pads, slow circles, one minute each hand.",
"seconds": 60,
"sides": "both"
},
"cautions": [],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/si4",
"lastReviewed": "2026-08-24"
}