厲兌 Lidui
“Sharp Exchange” · ST45
Foot Yangming · 45 of 45 · jing-well
Where. On the second toe, just off the corner of the nail on the side away from the big toe.
For. Nosebleed, toothache, dream-filled sleep.
Press. Press with a fingernail edge, on and off, for about a minute.
厲兌者，金也。在足大指次指之端，去爪甲角如韭葉按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Lidui Sits on the Second Toe
Look down at your foot and pick out the second toe — its neighbor, standing immediately beside the big toe. The dataset locates Lidui on that second toe, on the lateral side of the distal segment, 0.1 cun from the corner of the toenail. Each phrase deserves unpacking. The distal segment is the toe’s last stretch, beyond its final joint: the part that wears the nail. Lateral means away from the body’s midline, which on the second toe is the edge facing the third toe — the outside of the forefoot — never the side turned toward the big toe. And the corner of the toenail means precisely that: the outer corner where the nail meets the surrounding skin fold, with the point resting a hair’s breadth beside it.
The cun is the traditional proportional unit of Chinese point-location, taken from the body being examined rather than from any ruler, and 0.1 cun is almost vanishingly small — roughly the width of the narrow ridge of skin hugging a toenail. Small as the address sounds, classical maps gave points like this a complete identity: each of the twelve main channels keeps one wellspring point, called a jing-well point, perched at the very tip of a finger or toe beside the nail corner. The image behind the category is water finding the earth’s surface for the first time. At these extremities the channel’s activity is read as lying closest to the skin, arriving briskly and shallowly, like a spring breaking ground. Lidui is where the long stomach channel makes that final emergence.
Neighbors help fix the address. Walk back up the foot from the toenail and you pass through the recorded territory of the channel’s other low stations: Neiting (ST44) sits between the second and third toes at the margin of the web, where pale sole-side skin gives way to the darker dorsum, and Xiangu (ST43) rests farther back in the depression in front of the junction of the second and third metatarsal bones. From there the channel steps down through ever-smaller landmarks until Lidui completes the descent at the nail corner. Every person carries the set twice, once per foot, and locating them in order — hollow, web, then tip — turns a fiddly search into a short walk downhill.
A Self-Palpation Walkthrough
Set yourself comfortably: sit on a chair, rest one ankle across the opposite knee, and let the toes relax rather than curl. Identify the second toe by counting from the big toe inward, then turn your attention to its outer edge — the flank facing the third toe. Lay the pad of your thumb lightly against the side of the toe and slide toward the base of the nail. Where the outer corner of the nail meets the soft fold beside it, you arrive at a small pocket of tissue that often feels faintly tender or densely firm compared with the slack skin a millimeter away. That pocket — level with the nail corner rather than hidden beneath the free edge of the nail — is the recorded location.
Confirmations matter more than force here. Press feather-light and hold for a slow breath: many people notice a dull, prickling awareness bloom at the true spot and little at all nearby. Compare feet, since sensitivity frequently differs from side to side. Because the target is tiny, work with the thumb pad braced by the index finger steadying the toe from above — stability beats strength. Check your placement twice: the inner flank of the second toe, looking toward the big toe, belongs to a different geography entirely, and the middle of the nail itself is nobody’s point. If everything feels blunt and silent, shift a hair toward the nail corner rather than pressing harder.
Three slips account for nearly every failed search. The first is toe confusion: the little toe and the third toe also wear nail corners, and late in a tired day eyes and fingers blur — counting from the big toe settles it. The second is side confusion, landing on the inner flank; remember that lateral always means away from the body’s midline, whichever foot you are working on. The third is compensation by pressure, digging harder because the spot stays quiet; that only floods the area and erases the delicate signal. When lost, lift off completely, shake out the hand, and begin again from the count: second toe, outer edge, nail corner.
Reading the Name: Sharp Exchange
The characters reward a slow reading. Li 厲 carries dictionary senses of severe and fierce — the same syllable heard in the modern word lihai, formidable — and in older writing it doubled as a variant of li 礪, the whetstone, so it can also mean to sharpen or grind keen. Dui 兌 offers several threads at once: its everyday sense is exchange, trading one thing for another; lexicons note that ancient texts also used it for rui 銳, sharp-pointed; and in the symbolism of the Eight Trigrams it names the lake, associated with the mouth, with openings, and with joy. Severity and sharpening meet exchange and opening in the space of two syllables.
Commentators have long woven those strands into readings of the point, offered here as tradition rather than settled fact. One line of interpretation takes dui in its sharp sense and sees the keen little corner of nail and flesh where the point sits — the sharpest address on its channel. Another takes the mouth-and-opening association and hears an echo of the point’s recorded work in toothache and sore swollen throat, complaints gathered at the body’s own openings. And the wellspring character of jing-well points — activity arriving shallow, quick, and concentrated — sits naturally with li’s edge of severity. The readings differ; they agree that the name was chosen with intent.
Pinyin writes the name Lìduì. Both syllables carry the fourth tone — the falling tone, delivered with a short, decisive drop — so the name is spoken the way a whetstone strokes: two downward cuts. Checked against a standard dictionary and against the licensed dataset alike, li is fourth tone and dui is fourth tone; there is no rising or dipping anywhere in the name. The hanzi themselves, 厲兌, are compact and quick to recognise once seen. Like the gates, valleys, courtyards, and storehouses scattered along the channels, the name compresses a small teaching into two characters: look for the sharp place where the exchange happens.
Traditional Indications, Explained
The licensed records list seven indications: nosebleed, toothache, sore swollen throat, febrile disease, excessive dreaming, mania, and gastritis. The first three read clearly through the channel map. This site’s meridian summary traces the stomach channel down the whole front of the body, from the face to the second toe, and classical practice developed a habit of treating complaints near a channel’s upper reaches with points at its far end — the reasoning of a long rope pulled from either extremity. Nosebleed, toothache, and sore throat all sit in face-and-throat territory at the channel’s head, so the tiny point at its tail entered the classical conversation for them, traditionally invoked rather than clinically asserted.
The next grouping belongs to the jing-well character of the point. Febrile disease — fever and heat states — stands at the head of what classical texts describe for well points generally, and the old records repeatedly pair Lidui with disturbed sleep: excessive dreaming, vivid or frightening dreams, and agitated states the classics gathered under the word mania. In the traditional frame these belong to surplus rather than weakness — fullness with nowhere to go, read as needing an outlet at the channel’s furthest gate. Gastritis, a modern-sounding word to find in the list, follows the simplest traditional logic of all: the terminal point of a channel serves the organ that channel is named for.
It bears repeating plainly: these are the traditional uses recorded in a licensed dataset and described in classical literature, offered for cultural and historical understanding. They are not claims that pressing this point resolves illness, 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 single-point evidence remains thin. Recurring nosebleeds, worsening dental or facial pain, persistent fever, and sleep disrupted night after night all belong with professional care. Hold the tradition lightly; hold the referral rules tightly.
Self-Care Acupressure at Home
With the point found, arrange the practice. Warm feet respond better than cold ones — wash them warm first or practice after a bath, since chilled tissue guards itself. Sitting with the ankle crossed, brace the second toe from above with the index finger and place the thumb pad on the outer nail corner. Begin with contact alone for a few breaths, then move in small, slow circles, letting a pleasant dullness or mild warmth register — never sharpness. A sustainable home rhythm is one to three minutes per foot, once or twice daily; some people prefer a steady, patient hold over circles, which suits this small terrain equally well. Swap sides and keep the sessions symmetrical.
Because the working surface is a few square millimeters of thin skin beside the nail, quality matters here more than almost anywhere else. Feather-light and regular outperforms brief and forceful; tools, pen caps, and knuckles have no role. Coordinate with the breath where you can, easing attention inward on long exhales. Anchor the minute or two to something already habitual — drying your feet after a shower, sitting down with evening tea — because consistency, not intensity, is what self-care traditions actually ask for. If the nail corner is sore, cut, cracked, or troubled by an ingrown nail, simply choose another day; the point waits patiently.
Treat those minutes as a ceremony of attention rather than a treatment session. Perhaps the feet feel warmer afterward, perhaps the mind quiets for the duration, perhaps nothing changes except that you spent ninety seconds caring for the farthest reachable part of 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 more often to force a result the practice never promised. When curiosity pulls that way, return to gentleness, or simply stop for the day and let the wellspring settle.
Cautions and Safe Practice
Begin with what the record says — and does not say. The licensed catalogue attaches no specific caution to Lidui: unlike points that sit over vulnerable organs or carry pregnancy warnings, this nail-corner perch raises no named danger, and this page echoes that empty record exactly. Absence of a warning is not an invitation to force, though. The skin beside a toenail is among the thinnest working surfaces on the body, nerve endings crowd the toe tips, and the honest conclusion is simple: gentle, purely superficial contact remains the whole vocabulary of home practice here.
Practical rules follow. Skip the point entirely whenever the skin around the nail is broken, infected, or caught in an ingrown nail, and while any fungal or inflammatory flare is active nearby. Anyone living with diabetes, reduced sensation in the feet, or circulatory problems should ask a qualified practitioner before adding regular pressure to the toes — dulled feeling removes the early-warning system this kind of practice relies on. Stop at once on sharp, electric, or radiating sensation, and do not retry that day. Pregnant readers, and anyone managing a chronic condition, do best consulting their practitioner before beginning any new point routine at all.
And the wider rule stands over everything: this page is educational, acupressure is self-care, and neither diagnoses nor treats disease. Seek prompt medical attention — not a pressure routine — for nosebleeds that recur or resist stopping, facial or dental pain accompanied by swelling and fever, a sore throat that worsens or interferes with breathing or swallowing, a sustained high temperature, or nights ruined by frightening dreams and agitation. Persistent symptoms belong with a licensed practitioner, whether physician or East Asian medicine practitioner as suits the complaint. The kindest gift this tiny point offers most people is a slower, more attentive acquaintance with their own feet.
Lidui — a name tradition reads as “sharp exchange” — closes the stomach channel at the outer corner of the second toenail, the far end of a pathway this site traces down the whole front of the body, from face to second toe. Classical practice reached for this tiny wellspring point in nosebleed, toothache, sore swollen throat, fever, and troubled sleep.
Self-care limits
Frequently asked
- How do I find Lidui without knowing anything about cun?
- Use the toenail as the whole map. On the second toe — the one beside the big toe — look at the outer corner of the nail, the side facing the third toe. The point rests just beside that corner, in the little fold where nail meets skin. That is the entire recorded address; the 0.1 cun simply encodes “a hair’s breadth from the nail corner” in proportional language.
- Why would anyone press such a tiny spot?
- Classical maps treated size and importance as unrelated: the jing-well points, smallest of all addresses, open every classical discussion of their channels because they mark where the channel’s activity first meets the surface. For home practice the appeal is practical too — the spot tends to announce itself with a faint, distinct awareness under light touch, and a minute of attentive contact fits into any day. Nothing about a small point asks for a large force.
- What did classical practice use Lidui for?
- The recorded list runs: nosebleed, toothache, sore swollen throat, febrile disease, excessive dreaming, mania, and gastritis. Classical texts describe the point as the wellspring where the stomach channel’s activity emerges closest to the surface, and the channel’s face-to-second-toe course explains why complaints of the head were approached from the toe. These are traditional frameworks documented for context — not evidence-backed treatment claims.
- Why does a major channel finish on a second toe?
- This site’s meridian summary traces the stomach channel down the entire front of the body, from the face to the second toe — a journey spanning nearly the whole height of a person. Classical thinking favoured beginnings and endings that answer each other: a river traveling so far can be read at both banks, so conditions near its source could be addressed at its mouth. The wellspring imagery completes the picture — the far tip is where the current finally surfaces.
- Can pressing Lidui replace seeing a professional about my symptoms?
- No. Self-acupressure is comfort-level daily care, not diagnosis or therapy. Nosebleeds that repeat, dental or facial pain with swelling, fever that climbs or persists, and sleep broken by distressing dreams all need proper assessment promptly. Think of the two as different floors of the same building: daily self-care lives downstairs, clinical judgment upstairs. Neither substitutes for the other, and knowing which floor you currently need is itself a skill worth practising.
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, jing-well theory, and channel context.
- 03aijiu-mpvue (MIT License) licensed dataset, entry for ST45 Lidui — location, point class, actions, and caution field.
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/st45/leaf.json
- GET /zh-hant/points/st45/leaf.json
- GET /zh-cn/points/st45/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "ST45",
"name": {
"en": "Lidui",
"gloss": "Sharp Exchange",
"zh-Hant": "厲兌",
"zh-Hans": "厉兑"
},
"channel": {
"id": "ST",
"order": 45,
"of": 45
},
"location": {
"text": "On the second toe, just off the corner of the nail on the side away from the big toe."
},
"for": [
"nosebleed",
"toothache",
"dream-filled sleep"
],
"press": {
"text": "Press with a fingernail edge, on and off, for about a minute.",
"seconds": 60
},
"cautions": [],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/st45",
"lastReviewed": "2026-08-24"
}