中渚 Zhongzhu
“Central Islet” · TH3
Hand Shaoyang · 3 of 23 · shu-stream
Where. On the back of the hand, in the hollow between the ring and little finger bones, just behind the knuckles.
For. Ringing ears; headache; aching shoulder and arm.
Press. Gentle finger pressure, about a minute each hand.
中渚者，木也。在手小指次指本節後陷者中按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Zhongzhu Sits on the Hand
Turn the palm down and the back of the hand offers a simple map: two long bones — the metacarpals inside the ring finger and the little finger — run side by side from the knuckles toward the wrist, with a soft channel between them. The dataset places Zhongzhu on the dorsum of the hand, proximal to the fourth metacarpophalangeal joint, in the depression between the fourth and fifth metacarpal bones. Unpacked: the fourth metacarpophalangeal joint is the knuckle at the base of the ring finger; proximal means on the wristward side of it; and the depression is the shallow valley that runs between the two long bones. The point therefore sits just behind the ring-finger knuckle, in the groove — not on the loose skin of the web nearer the fingers.
What lies beneath the fingertip deserves a moment of attention before any pressing begins. The groove between the two metacarpals belongs to the hand’s working musculature — a layer of muscle padded over solid bone, with tendon strands crossing nearby whenever the fingers extend. Compared with points on the thin-walled chest wall or the delicate neck, the terrain here is forgiving: nothing hollow, nothing vital, nowhere for careful surface pressure to travel far. That forgiving geography is part of why points on the back of the hand became staples of home practice across generations. Forgiving still asks for gentle hands — bone sits close beneath the skin, so force is never needed here — but a beginner can explore without anxiety.
Two neighbours help confirm the address. Yemen (TH2), the next point toward the fingers, holds the web margin where the ring and little fingers meet, right at the change of skin texture at the edge of the web. Yangchi (TH4), the next point toward the wrist, occupies the hollow along the dorsal wrist crease. Zhongzhu keeps the middle stretch of the same groove — which is one traditional reading of the zhong, central, in its name. If your searching finger finds itself in loose webbed skin, drift back toward the knuckles; if it has climbed onto flat bone near the wrist, come down the groove again. Three stations mark out a single corridor, and this point lives in its middle room.
A Self-Palpation Walkthrough
Sit comfortably and rest the hand palm-down on a table or thigh, fingers relaxed and slightly curled — a soft fist lifts the knuckles a little and opens the groove between them, which makes everything easier to feel. Start from the knuckle at the base of the ring finger, the last firm bump before the finger begins. Rest the pad of your opposite index finger immediately on the wristward side of that knuckle, then let it settle into the shallow valley between the two long bones. With the hand relaxed, that settling place is a distinct depression — the neighbourhood the dataset describes: proximal to the fourth knuckle, between the fourth and fifth metacarpals.
A few quiet confirmations help before any pressure begins. Touch feather-light and compare hands: many people notice a faint, dull awareness right at the spot and very little sensation half a thumb-width away, and the two sides often differ slightly. Then flex and extend the fingers slowly under the resting fingertip — tissue in the true groove shifts and firms beneath contact, while bare tendon ridge or flat bone feels silent. The point is a small zone rather than a pinhead, so allow yourself half a thumb-width of tolerance around the ideal spot; patient searching finds it faster than force ever could.
The usual slips are easy to name. Drifting into the web itself sets you among thin, sensitive skin nearer Yemen’s territory, which was never the recorded location. Sliding too far up the groove carries you onto the flat backs of the metacarpal shafts toward Yangchi’s ground by the wrist crease, where sensation turns dull and uninformative. Pressing on the tendon ridge instead of beside it produces a hard, stringy feel rather than the soft give of the groove. Whenever the search loses its way, return to the opening ritual — find the ring-finger knuckle, drop to its wristward side, settle into the valley — and begin again calmly.
Reading the Name: Central Islet
The characters sketch a small landscape. Zhong 中 means central or middle — the character even pictures a marker set through the midst of something. Zhu 渚 names an islet: a dictionary sense of small sandbank or islet, a patch of stable land standing amid moving water. Set the hand beside the name and the image locks into place. The two metacarpals flank the groove like riverbanks; the spaces between the bones of the hand read as channels of water; and the small depression between them stands like an island holding midstream. Classical commentators offered a second reading too: the point occupies the middle stretch of the hand’s back, midway between fingers and wrist, so the zhong doubles as a position marker. Both readings share one picture — a small, firm resting place surrounded by flow.
The name also marks an office in classical theory. The five transport points sort each channel’s first five locations into an ascending series borrowed from waterways: well, spring, stream, river, and sea. Qi, in the traditional picture, behaves like water — emerging barely at the fingertip wells, trickling at the springs, broadening where the streams run, gathering current at the rivers, pooling wide at the seas near elbow and knee. Zhongzhu’s recorded category, shu-stream, sets it at the widening middle of that journey, and classical teaching describes stream-point territory as flow gathered enough to matter. Five-phase thinking went further: stream points of the yang channels were classically assigned the wood phase, and wood feeds fire — the phase to which the san jiao channel itself belongs in the traditional correspondences. Read that as the tradition extending its own imagery, documented for context rather than asserted as mechanism.
Pinyin renders the name Zhōngzhǔ, with a level, high first tone on zhong and a dipping third tone on zhu. The hanzi pair 中渚 is compact enough to memorise at a glance, and the image repays attention every time the fingers meet the groove: you are visiting an islet standing in a channel between two banks. Names in this tradition are rarely decoration — gates, pools, valleys, courtyards — they compress location and old ways of thinking about the body into a couple of syllables that a practitioner could carry across centuries without a diagram. Few points wear their own explanation as plainly as this one does.
Traditional Indications, Explained
The licensed record lists a generous portfolio: headache, red eyes, tinnitus, deafness, sore swollen throat, pain and numbness of the shoulder, back, elbow, and arm, inability to flex or extend the fingers, febrile disease, and malaria. Read as a group rather than a pharmacy list, clusters fall into place. One gathers the head and face — headache, red eyes, tinnitus, deafness, sore swollen throat — riding the mapped course of the channel, which runs from the ring finger up the outer arm all the way to the temple. Ear complaints in particular fill the classical records of this channel’s hand points; the tradition read complaints of the head and sense organs through the course of the channel passing nearby.
A second cluster belongs to the limb’s own territory. Pain and numbness tracking through shoulder, back, elbow, and arm follows the channel’s route up the outer limb, and stiff fingers that cannot flex or extend sit within easy reach of the point itself — the tradition’s plainest rule at work, the nearest good point serving the nearest complaint. The systemic entries close the list: febrile disease and malaria are historical heat-and-chill patterns, and hand points of the yang channels belonged to the classical toolkit for such episodes. These are period frameworks for understanding fever and shivering illness, recorded for context; a modern fever belongs with medical assessment, not with a pressure routine.
It bears repeating plainly: all of the above are traditional uses recorded in a licensed dataset and classical literature, offered here for cultural and historical understanding. They are not claims that pressing this point treats disease, and several entries translate poorly into modern life — new hearing loss, ringing that appears abruptly or affects one ear only, or a headache unlike any before it belong promptly with medical professionals, not with self-applied pressure. Where modern research has touched acupressure 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
Settle first: sit upright with shoulders released and rest the working hand palm-down, fingers softly curled, so the groove between the bones stays open. Place the pad of your opposite thumb on the spot found by the walkthrough above and let your index finger curl beneath the hand to support it, so the point is held between cushioned pads rather than squeezed between fingernails. Begin with contact alone for a few slow breaths, then add small, unhurried circles or a steady, patient hold. 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, eased in gently on the exhale and softened again on the inhale. Swap hands and treat both sides alike.
Quality outranks intensity, as everywhere in self-care. Warm your hands before beginning, because chilled fingers make the tissue guard; keep nails trimmed so the pad, not the edge, meets the skin; leave rollers, rings, and pointed devices in the drawer, because tools concentrate force in ways fingertips were never meant to. People who keep the habit usually anchor it to something already in the day — tea steeping, a laptop closed for lunch, the commute’s end — because regularity, not heroics, 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 hand feels less fatigued after long days of typing, perhaps the shoulders drop a notch while you press, perhaps nothing shifts except that you spent two minutes attending to your own body instead of scrolling past it. 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 in the hope that persistence converts into benefit. When curiosity pulls toward force, return to gentleness, or set the practice down for the day.
Cautions and Safe Practice
This point begins with good news: the licensed dataset records no special cautions for Zhongzhu. Geography explains why. Muscle and tendon lie over solid bone, and the structures that demand respect elsewhere — lungs, abdominal organs, major vessels — sit far from this patch of the hand. An absence of recorded cautions is not an invitation for force, though; it simply means no dataset-specific warning rides alongside the universal ones. Every rule of gentle practice applies here exactly as it does at every point on this site.
Practical limits guard the everyday map. Keep pressure light and strictly superficial, using finger pads and no tools or devices. Skip the point entirely over cut, abraded, blistered, or inflamed skin; pause during feverish illness; and wait until ordinary use of the hand is cleared after any recent injury, burn, fracture, or surgery there. During any session, sharp, electric, or radiating sensation means stop at once and do not try again that day; a lingering ache or numbness afterward means the pressure exceeded what the tissue welcomed. Pregnant readers, and anyone managing a chronic condition, do well to consult a qualified practitioner before adding any new point practice — a general rule of this site, applied here as everywhere.
And the wider rule stands over everything: this page is educational, acupressure is self-care, and neither diagnoses nor treats anything. Seek prompt medical attention — not a longer pressing session — for sudden or one-sided hearing loss, ringing that appears abruptly or affects one ear only, a severe or unprecedented headache, facial drooping or limb weakness, trouble speaking, or fever with a stiff neck. Those are alarms, not indications. For everything less dramatic that persists beyond a couple of weeks, a licensed practitioner — medical or East Asian medical, as suits the complaint — is the right next step. The islet in the groove is a fine place to visit; medicine is the road for anything that frightens you.
Zhongzhu, Central Islet, rests in the groove on the back of the hand between the long bones of the ring and little fingers. Classical practice reached for it in headache, ear complaints, and stiffness along the arm, and its forgiving geography suits gentle self-care well. This guide covers finding it by touch, pressing it safely, and the tradition behind the name.
Self-care limits
Frequently asked
- How do I find Zhongzhu without memorising any location terms?
- Let the hand draw the map. Make a soft fist, find the knuckle at the base of the ring finger, rest your fingertip on its wristward side, and settle into the shallow groove between the two long bones you feel there. Flex the fingers gently — the tissue should shift beneath your pad. The dataset’s wording, proximal to the fourth metacarpophalangeal joint between the fourth and fifth metacarpal bones, encodes exactly that landmark sequence.
- Is pressing Zhongzhu myself actually safe?
- For healthy adults, gentle fingertip pressure held on the surface is generally reasonable self-care here: the point lies in muscle over solid bone, well away from lungs and organs, and the licensed dataset records no special cautions for it. Home practice still respects the universal stop signals — sharp pain, electric or radiating sensation, or discomfort that worsens all mean finish immediately — and skips the point over broken skin, during feverish illness, and after recent hand injury until healing is cleared.
- Why do ear complaints fill this point’s history?
- Because of where its channel goes, in the traditional way of mapping. The san jiao channel runs from the ring finger up the outer arm all the way to the temple, and classical practice read complaints of the head and sense organs — headache, red eyes, ringing ears — through the course of whichever channel passed nearby. Tinnitus and deafness accordingly head the records of this channel’s hand points. Those are traditional frameworks for understanding the body, documented for context rather than offered as treatment claims.
- What is the difference between Zhongzhu and its neighbours Yemen and Yangchi?
- They share one corridor on the back of the hand and hold different stretches of it. Yemen (TH2) sits nearest the fingers, at the web margin between the ring and little fingers; Zhongzhu (TH3) holds the middle stretch, just on the wristward side of the ring-finger knuckle; Yangchi (TH4) rests in the hollow at the dorsal wrist crease. In classical theory each also carries a different office in the five-transport sequence. This guide concerns only gentle surface pressure at Zhongzhu — locating it correctly is the skill taught here.
- Can pressing Zhongzhu replace seeing someone about my headaches?
- No. Self-acupressure is comfort practice, not diagnosis, and any headache carrying red flags — sudden onset unlike any before, fever with a stiff neck, weakness or speech trouble, a blow to the head, or one that simply worsens across days — needs prompt professional assessment. 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, stream-point theory, and channel context.
- 03aijiu-mpvue (MIT License) licensed dataset, entry for TH3 Zhongzhu — location, point class, 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/th3/leaf.json
- GET /zh-hant/points/th3/leaf.json
- GET /zh-cn/points/th3/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "TH3",
"name": {
"en": "Zhongzhu",
"gloss": "Central Islet",
"zh-Hant": "中渚",
"zh-Hans": "中渚"
},
"channel": {
"id": "TH",
"order": 3,
"of": 23
},
"location": {
"text": "On the back of the hand, in the hollow between the ring and little finger bones, just behind the knuckles."
},
"for": [
"ringing ears",
"headache",
"aching shoulder and arm"
],
"press": {
"text": "Gentle finger pressure, about a minute each hand.",
"seconds": 60,
"sides": "both"
},
"cautions": [],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/th3",
"lastReviewed": "2026-08-24"
}