胞肓 Baohuang
“The Wrapping and the Deep” · BL53
Foot Taiyang · 53 of 67
Where. On the buttock, about level with the low-back dimples, four finger-widths out from the centre ridge of the sacrum.
For. Difficult urination; a stiff low back; bloating.
Press. Press firmly with the thumb, or sit on a firm ball, about a minute each side.
胞肓，在第十九椎下，兩傍各三寸陷者中按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Baohuang Sits on the Upper Buttock
The dataset places Baohuang on the buttock, level with the second posterior sacral foramen and three cun lateral to the median sacral crest. Unpacked: the sacrum is the triangular plate of fused bone at the back of the pelvis, its central ridge running down between the dimples of the low back, pierced by four pairs of small openings front and back. Level with the second of these puts the point roughly even with the familiar back dimples, and three cun — three proportional thumb-widths — carries it outward from the ridge onto the rounded mass of the upper buttock. A cun is measured from the person, not from a ruler, so the exact distance varies with build.
Two neighbours fix the address from either side of the map. On the same horizontal line but half the distance from the midline sits Pangguangshu (BL28) at one-and-a-half cun; continue outward past it another one-and-a-half cun and you arrive at Baohuang. One row below, level with the fourth sacral opening, Zhibian (BL54) carries the same outer line onward. The point belongs to the outer of the two parallel lines that classical descriptions give the bladder channel along the back — the inner line hugging the spine at one-and-a-half cun, the outer walking a wider arc through the long muscles beside the spine — before the route turns down the back of the thigh toward the leg.
Under the fingertips lies the thickest muscle padding on the body: the gluteus maximus sweeping across solid pelvic bone, with deeper structures far beneath. Nothing fragile sits close to the surface here, which is one reason the sacral and gluteal points make forgiving company for gentle self-care. What the fingers meet is firm, springy bulk rather than bare bone or gristle, so finding the spot is less a matter of surgical precision than of orienting to the whole neighbourhood — ridge, row, and outward slope. Get those three bearings right and the point is already under your hand.
A Self-Palpation Walkthrough
Stand or sit where you can reach behind yourself comfortably, or lie face-down and ask a partner to help if reaching is awkward. Find your landmarks at the waist first: slide your hands around the hip rim from the sides until they settle into the shallow dimples many low backs show. Those dimples sit roughly level with the second pair of sacral openings — the height of our target row. Now walk your thumbs downward and slightly inward onto the flat plate of the sacrum, find the central ridge running vertically there, and confirm it by the knobbled spine of fused vertebrae beneath the skin.
From the ridge, measure outward along the dimple line: about one-and-a-half thumb-widths out brings you to the inner line — Pangguangshu’s territory — and another one-and-a-half lands on Baohuang’s ground, three thumb-widths from the ridge in all. Because buttock tissue is springy, press firmly enough during the search to feel structure beneath, but explore with small sweeps rather than one sudden push. Most people register the true neighbourhood as a subtly denser, sometimes faintly tender band in the upper-outer quarter of the buttock — level with the dimples themselves, carried outward onto the rise of the hip.
Confirm before any pressing begins. Compare sides with light touch: the good spots usually answer with a dull, spreading awareness while nearby skin feels little. Check the height again — the point should stay even with the dimples, neither drifting up onto the soft flank nor sliding down toward the tailbone. Then check the distance: too close to the ridge means you have found the inner line instead, too far out rides up the side of the hip. Search slowly, count thumb-widths aloud if it helps, and when in doubt return to the ridge and start the outward walk once more.
Reading the Name: the Wrapping and the Deep
Bao 胞 is the elder character of the pair, and its oldest recorded sense is intimate: the wrapping that enfolds a newborn child — caul, afterbirth, womb. From that cradle-meaning it stretched to cover the watery nursery of the lower belly, and commentators discussing this point have read it as reaching toward the bladder and the water-passages below. The same character lives on in everyday words: siblings born of one womb share it, and the modern term for a living cell — a single wrapped unit of life — carries it too. A character that began as envelope became an emblem of everything held within.
Huang 肓 is rarer and stranger. Classical teaching describes the huang as the deep interior spaces between the vital organs and the body wall — country so remote that old physicians ranked it beyond medicine’s reach, a reputation sealed by the proverb about illness entering the gao and the huang, meaning a matter past remedy. Set beside bao, the pairing reads almost like a direction of travel: from the wrapped, watery shallows of the pelvis down toward hidden places ordinary hands never visit. The name quietly admits what the point overlooks — the body’s most private interior, addressed only ever from outside.
Pinyin writes the name Bāohuāng, and both syllables carry the flat, level first tone: bao in first tone for the wrapped-newborn sense, huang likewise first tone in the medical sense used here. One visual warning earns its keep: huang looks nearly identical to mang 盲, blind — but mang keeps an eye 目 beneath its canopy while huang bears the flesh-sign 月, fittingly, since the huang is flesh-country. Learn the difference once and you have learned half the story: eye-blind above, flesh-deep below, two characters apart by a single radical.
Traditional Indications, Explained
The record reads: retention of urine, stiff pain of the spine and lower back, borborygmus, abdominal distension, and constipation. Take the urinary entry first, framed as tradition. Classical physiology gave the bladder the office of qi transformation — the vaporous conversion that lets stored water leave the body smoothly — and when that office stalled, old texts spoke of dribbling, blockage, and retention. Classical practice grouped the sacral region with the water-passages of the lower body, so a point whose very name leans toward the wrapped pelvis belonged naturally to such discussions.
The spinal and lumbar entry follows the plainest channel logic of all. The bladder channel descends the entire back in paired lines, crossing exactly the territory where stiffness and ache collect — the great cables beside the spine, the sacrum, the upper buttock. Points along a route were reached for what lay along it, and Baohuang stands at the junction where the long muscles of the back hand over to the buttock, squarely at the meeting-place of that discussion. Local tenderness found by touch reinforced the choice: classical practice treated the body’s own sore spots as signposts, and this one often announces itself.
The remaining trio — borborygmus, distension, constipation — belongs to the intestines. Rumbling loud enough to hear in a quiet room, a belly blown tight, motions slow and grudging: the old literature filed these as qi and water failing to move in the lower burner, and the outer line of the back served as a standing address for such complaints. As ever, the honest frame is historical. These are traditional associations recorded in a licensed dataset, offered for cultural understanding — not promises that pressing this point resolves any condition. Where modern work touches self-applied pressure at all, reviews suggest effects are modest and context-dependent, and evidence for any single point stays thin.
Self-Care Acupressure at Home
Settle somewhere warm and unhurried — seated sideways on a firm chair, or lying face-down with a folded towel under the ankles. Reach back with the opposite hand and lay the pad of your thumb on the located spot. Contact comes before pressure: rest there through a few slow breaths, then begin small, slow circles, letting the thick gluteal tissue take the movement without any grinding. Pressure should read as pleasant heaviness or a spreading dull warmth — never sharpness. A common home rhythm is one to three minutes per side, once or twice daily, matched to long exhales; then swap hands and give the other side its turn.
Because the padding here is generous, fingertip pressure can feel vague; many people prefer a loose fist resting on its flat surface, or simply the heel of the palm leaning in — always broad, never pointed. Tools stay out of this practice, and so does force: the tradition this page borrows asks for patience, not power. Warm the area first on cold days, since chilled muscle guards and mutes sensation. Anchor the habit to something already in your evening — the wind-down hour, a stretch on the floor — because regularity is what self-care traditions actually request, and one honest minute daily outranks ten minutes done rarely.
Treat the session as attendance rather than treatment. Over weeks you might notice the area feeling less guarded, the low back easier as you stand up, or nothing beyond the pleasure of a deliberate pause — every outcome inside that range fits honest self-acupressure. What falls outside it is escalation: pressing harder to force a result, extending sessions to chase a promise, working through pain. When curiosity pulls that way, return to gentleness, shorten the practice, or set it aside for the day. The point will still be there tomorrow, exactly where the ridge and the dimples left it.
Cautions and Safe Practice
The licensed record for Baohuang lists no specific cautions — unlike chest and neck points whose records carry explicit warnings. Geography explains much of the calm: the point lies over the thickest muscle of the body, spread across solid bone, with nothing delicate anywhere near the skin. Gentle surface work meets padding, not peril. A clean record, however, is not an open invitation; it simply means the universal discipline of this layer supplies all the rules, and those stand undiminished here as anywhere.
So the rules remain the rules. Finger pads or palm — never elbows, knuckles, or tools. Nothing over broken skin, rashes, bruises, or fresh injury around the pelvis or tailbone. Sharp, electric, or radiating sensation ends the session at once. Pregnant readers should clear any new point practice with a qualified practitioner first, since traditional teaching leaves several pelvic and lower-trunk points alone during pregnancy. Anyone managing conditions of bladder or bowel control, recovering from pelvic surgery, or living with persistent numbness in the legs should likewise talk with their clinician before beginning.
And the wider rule stands over everything: this page is educational, and acupressure is self-care, not diagnosis or therapy. Certain signs call for prompt medical care rather than any routine — inability to pass urine, blood in the urine, fever alongside back pain, new loss of bladder or bowel control, progressive weakness or numbness in a leg, severe or steadily worsening low-back pain, or pain that wakes you at night. Persistent symptoms belong with a licensed practitioner, medical or East Asian medical as suits the complaint. Baohuang asks little of its visitors; give it lightness, and send heavier questions to people trained for them.
Baohuang, the Enveloping Deep, rests high on the buttock, level with the second opening of the sacrum and three cun out from the midline ridge. Classical practice turned here for stubborn urinary difficulty, stiff low backs, and restless, rumbling bowels. This guide shows how to find it by touch and press it gently.
Self-care limits
Frequently asked
- How do I find Baohuang without knowing anything about cun?
- Let the dimples do the surveying. Slide your hands around from the waist until they settle into the two shallow dimples of the low back — you are now level with the target row. Find the ridged centre line between them, then walk outward across the sacral plateau about three thumb-widths in total: halfway out passes the inner line, and the end of the walk lands on the rising slope of the upper buttock. Cun measurements encode precisely this landmark walk in proportional language.
- Is pressing Baohuang myself actually safe?
- For healthy adults practising gentle, purely surface contact, generally yes — the point lies over thick gluteal muscle and solid bone, far from the structures professional training handles with special care. Respect the ordinary stop signals: sharp or radiating sensation, discomfort that worsens, any broken or irritated skin under the fingers. Skip the practice during pregnancy until a practitioner advises you, and treat persistent symptoms as reasons to see someone, not reasons to press harder.
- What did classical practice use Baohuang for?
- The traditional record groups difficult or blocked urination together with stiff pain of the spine and lower back, borborygmus, abdominal distension, and constipation. Classical thinking tied the sacral region to the water-passages and to the long channel lines governing the back, which is why plumbing complaints and back complaints share one address. These are traditional frameworks documented for context — not evidence-backed treatment claims.
- Why does the name pair a wrapping with something deep?
- Bao names the wrap — the caul and womb that enfold a new life, extended by commentators toward the pelvic water-passages. Huang names the deep interior spaces between organs and body wall that old medicine called beyond its reach. Together they sketch a descent: from the wrapped shallows of the pelvis toward the hidden interior — exactly the journey a fingertip makes in imagination when it presses the body wall over the deepest part of the trunk.
- Can acupressure at Baohuang replace seeing someone about my symptoms?
- No. Self-acupressure comforts; it does not diagnose. Urinary changes, bowel changes, or back pain that persist, worsen, or arrive with red flags — fever, blood, loss of control, night pain — need professional assessment promptly. Picture two floors of one building: daily self-care lives downstairs, clinical medicine keeps the consulting room upstairs, and neither substitutes for the other. Use the downstairs room freely; climb the stairs without hesitation when symptoms knock more than once.
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, the deep huang region, and bladder-channel context.
- 03aijiu-mpvue (MIT License) licensed dataset, entry for BL53 Baohuang — location, action record, 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/bl53/leaf.json
- GET /zh-hant/points/bl53/leaf.json
- GET /zh-cn/points/bl53/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "BL53",
"name": {
"en": "Baohuang",
"gloss": "The Wrapping and the Deep",
"zh-Hant": "胞肓",
"zh-Hans": "胞肓"
},
"channel": {
"id": "BL",
"order": 53,
"of": 67
},
"location": {
"text": "On the buttock, about level with the low-back dimples, four finger-widths out from the centre ridge of the sacrum."
},
"for": [
"difficult urination",
"a stiff low back",
"bloating"
],
"press": {
"text": "Press firmly with the thumb, 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/bl53",
"lastReviewed": "2026-08-24"
}