承扶 Chengfu
“Holding Support” · BL36
Foot Taiyang · 36 of 67
Where. At the centre of the crease under the buttock.
For. Low back, buttock and thigh ache; haemorrhoids.
Press. Press firmly with the fingers, or sit on a firm ball, about a minute each side.
承扶，一名肉郤，一名陰關，一名皮部，在尻臀下按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Chengfu Sits on the Back of the Thigh
The dataset locates Chengfu in one calm sentence: on the back of the thigh, at the midpoint of the gluteal crease. Unpacked for hands rather than rulers: the gluteal crease is the horizontal skin fold where the rounded mass of the buttock meets the back of the thigh — the crease that deepens when you bend forward or lift a knee, running roughly from near the body’s midline outward toward the side of the hip. Chengfu stands halfway along that fold, and the point arrives as a mirrored pair, one station on each side. Notice what the definition does not contain: no cun distances at all. Like certain stations elsewhere on the channel, Chengfu is anchored to a landmark every body owns rather than to a measurement anyone must take, which removes all arithmetic from the search.
What lies under the fingertips here is generous padding. Beneath the skin come soft tissue and then some of the thickest muscle the body keeps anywhere: the long muscles at the back of the thigh — the hamstrings — gather near their upper end in this region and run together down toward the knee. Nothing fragile rides close beneath the surface. There are no thin gaps between ribs, no bony hollows sheltering delicate structures, none of the exacting geography that makes other addresses demand special care. The trade is that the muscle here is dense and often guarded, especially in people who sit for long hours, so exploration rewards warmth and patience rather than force. The fold also shifts subtly between postures — it reads differently standing than lying face down — which is normal, and exactly why the walkthrough below asks you to look in more than one position.
The wider map explains the address. Chengfu belongs to the bladder channel, the longest pathway in the traditional cartography — sixty-seven stations strong, drawn from the inner corner of the eye, sweeping over the head, and descending the whole length of the back before crossing the buttock and turning down the back of the thigh toward the little toe. This station marks the doorway where that road leaves the buttock and enters the long corridor of the thigh. The record itself confirms the direction of travel: Yinmen (BL37), the next station down, is located on the line connecting Chengfu and Weizhong (BL40), six cun below Chengfu — and Weizhong stands at the midpoint of the crease behind the knee. A line from the crease of the buttock to the crease of the knee, with stations strung along it: self-location here is simply joining two folds and trusting the road between them.
A Self-Palpation Walkthrough
Begin by choosing a posture that lets the buttock and thigh relax: standing side-on to a mirror with weight even on both feet, or lying face down with a pillow under the ankles. To make the crease obvious, bend one knee up toward the chest or step into a gentle forward reach and settle back — the fold at the base of the buttock deepens and draws clearly across the thigh. Trace it with your fingertips from near the midline outward until you know its whole course, then return to its middle. Halfway along the fold, roughly level with the centre of the buttock’s width, is the address the dataset records. Repeat the whole search on the other side, because the two creases rarely feel identical and each point deserves its own confirmation.
A few quiet checks settle the placement. Touch feather-light and compare sides: many people notice a broad, dull awareness or faint tenderness at the true spot and little sensation a finger-width away, though some feel nothing distinctive at all — absence of sensation is not absence of location. Check the height: the spot should sit right on the fold line, neither climbing onto the fleshy buttock above nor sliding down the thigh below. Check the width: it belongs near the middle of the thigh’s back, not drifting inward toward the inner thigh or outward toward the hip. If you want a cross-check from the other end, find the crease behind the knee and walk your fingertips upward along the middle of the thigh’s back, counting slow thumb-widths; the road between the two folds is the channel’s own line, and the top of it is where Chengfu waits.
The classic mistakes are few and worth naming. The first is settling high on the buttock itself — soft, broad, and tempting, but above the fold; Chengfu belongs to the crease line, at the meeting of buttock and thigh. The second is wandering down the thigh, where the muscle is equally soft and nothing announces the error; distance discipline comes from keeping the fingertip glued to the fold. The third is drifting inward or outward off the middle of the thigh’s back. And the fourth is pressing hard into dense muscle hoping force will reveal what patience would have found anyway — force teaches the fingers nothing here. When doubt arises, stand up, draw the knee toward the chest once more, and let the crease redraw its own map.
Reading the Name: Holding Support
The characters tell a working story. Cheng 承 means to bear, to carry, to hold up, to receive something from beneath — the gesture of cupped hands placed under a weight. Fu 扶 means to support with the hand: helping someone upright, steadying them as they walk, lending an arm at the moment balance wavers. Read together, Chengfu carries the sense of holding support — bearing weight while offering steadiness. The imagery fits the site with unusual precision. The gluteal crease is precisely where the thigh takes up the trunk’s burden all day, folding under load whenever a person sits, climbs, or lifts; and when someone pushes themselves up from a low chair, it is the back of the thigh that their hand instinctively braces against. The name describes the job the region already performs.
Point-name traditions love this kind of functional poetry, and the channel offers plenty of company: gates and barriers higher on the back, streams and hollows elsewhere, and along this stretch of thigh a family of addresses named for how the body holds and moves its own weight. Classical texts discuss the stations of the posterior thigh as a working set — consulted along one line for troubles of the low back and leg — without ever needing the vocabulary of modern muscle charts to say so. Reading names this way is part of the tradition’s teaching method: each name compresses location, landscape, and the work assigned to the place into two syllables, so a student who knows the language carries the map in memory. Chengfu is a particularly plain example — a crease that supports, named for the act of supporting.
Pinyin renders the name Chéngfú, and the tones repay character-by-character attention. Both syllables carry the second tone — the rising tone, written with an acute accent — so the voice climbs twice: chéng, then fú. These are exactly the readings dictionaries record for each character: chéng, second tone, for the character meaning to bear or hold up; fú, second tone, for the character meaning to support with the hand. Two identical rises give the name a lifted, encouraging cadence, which suits a point named for helping someone up. The hanzi pair 承扶 stays compact enough to memorise at a glance, and like the gates, valleys, and courtyards scattered along the channel, the metaphor here does honest work: it tells you what the place is for. The name is itself a small set of instructions.
Traditional Indications, Explained
The recorded indications read: pain of the lower back, sacrum, buttock, and thigh; haemorrhoids; constipation; and urinary retention. Framed as tradition rather than promise, the list divides cleanly in two. The first cluster is local geography: every item is a complaint of the territory this station overlooks, and the bladder channel passes through all of it — down the back, across the sacrum, through the buttock, and along the back of the thigh. When discomfort settled anywhere along that road, classical practice consulted stations standing on it, and as the channel’s doorway between buttock and thigh, Chengfu belonged to such discussions naturally. Low back and sacral pain appearing here needs little explanation: the channel is the road, and the road runs through the property.
The second cluster — haemorrhoids, constipation, urinary retention — looks further afield until the traditional frame is restored. All three are disturbances of the body’s lower passages: stool, water, and the vessels of the lowest trunk. The channel carrying these records bears the bladder’s name and travels, in five-phase teaching, as one half of the body’s water pair alongside the kidney; the sacrum above this station stood in old discussions as a crossroads where those passages could be addressed. Records therefore grouped complaints of the bowels and waterways with stations along the channel’s lower course, and the posterior-thigh line shared in that work. This is the tradition’s own logic — the road serves the region, and practice served the region by way of the road — offered here as context, not as a promise about outcomes.
It bears repeating plainly: these are the traditional uses recorded in a licensed dataset and classical literature, offered for cultural and historical understanding. They are not claims that pressing this point treats disease, 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. Haemorrhoids, persistent constipation, and changes in urinary habits in particular deserve proper eyes on them before they earn a self-care routine. Hold the tradition lightly, and hold the safety rules firmly.
Self-Care Acupressure at Home
With the point located by the walkthrough above, settle into position: seated on the front edge of a firm chair with feet flat, or lying face down with the ankles supported so the back of the thigh softens. Reach back and rest the pads of your fingers — never the tips, never an elbow or any tool — on the fold at its midpoint. Begin with contact alone for a few breaths, letting the muscle learn the touch, then add small, slow circles, allowing skin to glide over the tissue beneath rather than grinding into it. Pressure should register as pleasant dullness or mild warmth spreading locally, never sharpness. A common home rhythm is one to three minutes per side, once or twice daily, matched where possible to slow exhales; swap sides and keep the sessions symmetrical.
Quality matters more than duration. Warm your hands first if they run cold, because chilled muscle guards. Choose a quiet corner over a screen and treat the practice as a pause rather than a task; people who keep it up usually anchor it to an existing habit — after a shower, before sleep — because consistency, not intensity, is what self-care traditions actually ask for. Pairing helps too: a minute of gentle pressure followed by unhurried movement suits the back of the thigh far better than aggressive stretching of cold muscle. An easy stroll, standing and sitting a few times slowly, or drawing a knee toward the chest while lying down all let the region move again after being attended to. What this territory asks of self-care, more than anything, is gentleness and regularity.
Treat the exercise as a small ceremony of attention rather than a treatment session. Across weeks, notice what changes: perhaps the area feels less guarded when you touch it, perhaps sitting feels easier after your minute of care, perhaps nothing shifts except that you spend ninety seconds attending to muscles that carry you all day. Every one of those outcomes fits the honest scope of self-acupressure. What does not fit is escalation — pressing harder, longer, or deeper into dense tissue to force a result. When curiosity pulls that way, return to gentleness or simply stop for the day; the fold will still be there tomorrow, exactly where the crease said it would be.
Cautions and Safe Practice
Chengfu carries a notably quiet record in the licensed data: the dataset lists no specific caution for this point, unlike stations whose warnings fill their entry lines. Geography explains most of that calm. Beneath the skin lies thick, well-padded muscle — the long muscles of the thigh’s back — and nothing delicate sits within reach of anything surface contact can exert: no lung behind thin gaps between ribs, no eye or organ close beneath the skin. But a quiet record is not a license for force. The corridor of the back of the thigh also serves as the highway of the sciatic nerve, the great nerve of the leg, which is one reason the stop signals below deserve literal obedience: sharp, electric, or radiating sensation means stop at once, not press through.
For fingertip acupressure the practical rules are simple. Use finger pads only — never elbows, knuckles, or tools — and keep pressure light enough to stay comfortable throughout. Skip the point entirely over broken, bruised, or irritated skin, over swollen or tender veins, and during an acute flare of thigh or back trouble; after any recent injury to the area, or after surgery on the hip, thigh, or knee, wait until a clinician has cleared ordinary movement before adding any point practice. Pregnant readers should consult a qualified practitioner before starting a new routine, and anyone living with diagnosed nerve conditions of the legs, circulatory disorders, or diabetes affecting the limbs does well to ask first — not because gentle surface contact is known to harm, but because individual circumstances deserve individual advice.
And the wider rule stands over everything: this page is educational, and acupressure is self-care, not diagnosis or therapy. Some stories in this region need prompt professional attention rather than any pressure routine: low back pain accompanied by fever; numbness, tingling, or weakness spreading down a leg; new changes in bladder or bowel control; heavy or persistent bleeding attributed to haemorrhoids; constipation that will not resolve; or symptoms persisting beyond a few weeks without explanation. Seek licensed medical or East Asian medical care as suits the complaint — promptly, and alongside self-care rather than instead of it. The quiet record is reassuring, but the safest gift Chengfu offers most people is a kinder acquaintance with the muscles that hold them up: attended regularly, pressed gently, and sometimes simply left alone.
Chengfu, “Holding Support”, sits where the buttock folds into the back of the thigh, at the midpoint of the gluteal crease. Classical practice reached for it when the low back, sacrum, or thigh ached, and when bowels or water passages complained. This guide walks through finding it by touch and pressing it gently at home.
Self-care limits
Frequently asked
- How do I find Chengfu without knowing anything about cun?
- You do not need any. The dataset defines this point by a landmark rather than a measurement: find the crease where the buttock folds into the back of the thigh — clearest when you lift a knee or bend forward — and rest your fingertip at the middle of that fold. If you want a cross-check from below, find the crease behind the knee and walk upward along the middle of the thigh’s back; the road between the two folds is the channel’s own line, and the top of it is where Chengfu waits. Proportional measures like the cun simply encode the same landmarks for practitioners.
- Is pressing Chengfu myself actually safe?
- Gentle fingertip pressure held on the surface is generally reasonable self-care for healthy adults: the licensed record lists no specific caution for this point, because thick muscle lies beneath the skin and nothing fragile sits within reach of surface contact. Safety here is mostly restraint and judgment — light force, pads not tips, healthy skin only — and immediate respect for sharp, electric, or radiating sensations, which are a signal to stop rather than to press harder.
- What did classical practice use Chengfu for?
- The traditional record lists pain of the lower back, sacrum, buttock, and thigh, alongside haemorrhoids, constipation, and urinary retention. The pain entries follow the channel’s own descent through the region; the bowel and waterway entries belong to the tradition’s habit of addressing the lower passages at stations along the bladder channel’s course. Those are traditional frameworks for understanding the body, documented for context — not evidence-backed treatment claims.
- Why does a bladder-channel point appear in old discussions of haemorrhoids and constipation?
- Because in the traditional cartography the channel is a road, and roads serve the regions they cross. The bladder channel runs the whole length of the back and lower limb, and classical practice treated stations along it as doors into the affairs of the lower trunk — the sacrum above this point was a busy crossroads for exactly those discussions. Chengfu, standing where the road leaves the buttock for the thigh, inherited a share of that portfolio. This is traditional reasoning, recorded for cultural understanding rather than asserted as mechanism or outcome.
- Can acupressure at Chengfu replace seeing a doctor about my symptoms?
- No. Self-acupressure is a comfort practice, not a diagnostic tool, and several warning signs in this region deserve prompt assessment: fever accompanying back pain, numbness or weakness travelling down a leg, new changes in bladder or bowel control, significant bleeding, or anything persisting beyond a few weeks. Think of the two as different floors of the same building: daily self-care lives downstairs, and clinical medicine keeps the consulting room upstairs that you visit when symptoms persist 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 bladder-channel context.
- 03aijiu-mpvue (MIT License) licensed dataset, entry for BL36 Chengfu — 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/bl36/leaf.json
- GET /zh-hant/points/bl36/leaf.json
- GET /zh-cn/points/bl36/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "BL36",
"name": {
"en": "Chengfu",
"gloss": "Holding Support",
"zh-Hant": "承扶",
"zh-Hans": "承扶"
},
"channel": {
"id": "BL",
"order": 36,
"of": 67
},
"location": {
"text": "At the centre of the crease under the buttock."
},
"for": [
"low back",
"buttock and thigh ache",
"haemorrhoids"
],
"press": {
"text": "Press firmly with the fingers, or sit on a firm ball, about a minute each side.",
"seconds": 60,
"sides": "both"
},
"cautions": [],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/bl36",
"lastReviewed": "2026-08-24"
}