髀關 Biguan
“Gate of the Thigh” · ST31
Foot Yangming · 31 of 45
Where. Straight down from the bony point at the front of the hip, level with the crotch, in a dip on the front of the thigh.
For. Weak legs, low-back ache, cold knees.
Press. Firm thumb pressure, about a minute each leg.
髀關，在膝上伏兔後交分中按 · Press with me
Six slow breaths
About a minute. Press as you breathe out, ease as you breathe in.
鄰 · Neighbouring leaves
Where Biguan Sits on the Front of the Thigh
Biguan holds the first station of the stomach channel on the leg itself, and its address comes in the dataset’s own words: on the front of the thigh, on the line running from the anterior superior iliac spine to the lateral end of the base of the patella, level with the perineum when the hip is flexed, in the depression lateral to the sartorius muscle. Unpacked, the line in question is the diagonal road down the front of the thigh: one end rests on the sharp bony point you can feel at the outer front rim of the hip — the anterior superior iliac spine, usually shortened to ASIS — and the other rests on the outer corner of the kneecap’s base. Biguan stands near the top of that road, close beside the crease where the leg folds against the body.
The phrase “level with the perineum when the hip is flexed” sounds technical but describes something easy to reproduce: when you sit upright on a chair, the hip is flexed, and in that posture Biguan sits roughly as high as the perineum — which is to say, very high on the thigh, up where the leg meets the trunk rather than out along its middle. The traditional measuring scheme reckons this whole thigh road at eighteen cun from the hip prominence to the base of the kneecap, measured proportionally on the person being examined; a cun remains, as everywhere on these channels, about one thumb-width of your own hand. What lies under the fingertips here is generous: skin, a variable cushion of fat, and beneath them the thick, broad sheet of the quadriceps, the great extensor group of the thigh. Few territories on any channel are as forgiving under gentle hands: the muscle here is thick, padded, and far removed from bone, chest, and abdomen alike.
Neighbors make the address easier to trust. The same diagonal line carries two more stomach points below Biguan: Futu (ST32), whose own record places it six cun above the base of the kneecap, and Yinshi (ST33) three cun above it. Read downward, the ladder runs Biguan, then Futu, then Yinshi, each stop a fixed count closer to the knee. Each station exists twice, once on each side of the body, mirror images holding the same heights. If a search wanders, nothing is lost: return your fingers to the bony point at the front of the hip, re-find the diagonal, and begin again. The line forgives repetition.
A Self-Palpation Walkthrough
Sit upright on a firm chair with both feet planted and the thighs released, so the muscles across the front of the hip soften; this seated posture supplies exactly the flexed hip the location description asks for. Begin by finding the starting post of the whole map: rest your hands on your hips and feel for the sharp bony point at the front outer edge of the waistband line — that is the anterior superior iliac spine. From it, walk your fingertips down and inward along the diagonal toward the outer corner of the kneecap’s base, keeping the path strictly on the front of the thigh. You are aiming for the upper stretch of that line, close to the hip fold, where a soft hollow sits just outside the strap-like sartorius muscle that crosses diagonally from hip toward inner knee. Settle your fingertips there, in the groove beside that crossing strap, high on the thigh.
A few quiet confirmations turn a guess into a find. Touch feather-light and compare the two sides: many people notice a faint, dull awareness or a mild ache at the true spot, and considerably less a finger-width away. Next, straighten one knee slowly against nothing at all — lifting the heel a few centimeters off the floor — and keep your other hand resting over the located spot; if the place swells and firms into the gathering muscle, you are on the quadriceps where the point belongs, not lost toward the groin. Re-check the height as well: the spot should sit in the upper quarter of the thigh, near the crease, unmistakably above the midway point between hip and knee. Three agreements — line, muscle, height — pin the placement down.
Three slips account for most missed attempts. The first is drifting inward off the muscle and into the true groin fold, where the tissues soften and deepen — leave that territory to professionals and come back outward onto the thigh. The second is sliding too far down the diagonal toward Futu’s address; remember that Biguan keeps company with the hip, not the knee. The third is hunting with the leg braced and the breath held, which turns every square centimeter equally firm and hides the hollow the description mentions. Loosen the thigh, exhale, and let the fingers start again from the hip bone, unhurried. None of these slips costs anything but a minute; the landmarks repeat themselves patiently for whoever returns.
Reading the Name: Gate of the Thigh
Read character by character, the name draws a doorway. Bi 髀 is the old literary word for the thigh, and especially for the thighbone and the upper region where the leg swings at the hip; dictionaries gloss it simply as thigh or thighbone, and it survives in daily speech only in words for poultry legs, a quiet reminder that it names the meat and frame of the upper limb. Guan 關 means gate, pass, or barrier — the character behind door bolts, mountain passes, and joints alike, wherever a route narrows to a single guarded opening. Joined, Biguan reads the gate of the thigh: the place where the leg meets the trunk through one defined passage, and where whatever travels between them was imagined to pass.
The image fits the geography. Classical texts describe the stomach channel beginning beside the nose and descending the front of the body — across the face, down the throat, through the chest and abdomen — before stepping off the trunk onto the front of the thigh toward the second toe. Biguan stands at the doorstep of that step-off, where the descending course passes from torso country into leg country, and the namers marked such crossings with gates all over the channel maps. Classical teaching also associated the yangming channels — the stomach and large intestine systems — with abundant qi and blood and with the nourishment of muscle and sinew, so a gate standing watch over the thigh’s great muscles had obvious work to do in the traditional picture. All of this is framework, faithfully reported rather than proven; it explains why the old writers posted a sentry here.
Pinyin renders the name Bìguān. The first syllable falls sharply on the fourth tone, a short decisive drop; the second rides high and even on the first tone, steady as a lintel. The two hanzi 髀關 are compact enough to take in at a glance, though the first is rare enough in daily life that many readers meet it only at this point — one more way the channels preserve old vocabulary. Like so many stations named for architecture — gates, valleys, granaries, courtyards — the metaphor does real work: it tells the seeking hand that this is a passage, a threshold the tradition treated as worth marking and minding.
Traditional Indications, Explained Honestly
The recorded indications read: atrophy and paralysis of the lower limb, lumbar pain, cold knees, and inguinal lymphadenitis. The first entry belongs to a pair of ancient categories. Wei, often rendered atrophy or flaccidity, described limbs growing weak, thin, or unresponsive; bi, often rendered obstruction, described stiffness, numbness, and aching where movement felt blocked. The two travel together in the old records as limp, blocked conditions of the limbs, and classical practice discussed them largely along the yangming channels, reasoning that the stomach and spleen systems govern muscle and limb in the traditional physiology. A point commanding the thigh’s largest muscles therefore stood naturally at the front of such discussions.
Lumbar pain and cold knees extend the same logic along the channel’s course. Standing at the junction of trunk and leg, the point was reached for when discomfort straddled that junction — aching gathered at the low back and running down the front of the thigh — and when the knees carried what the records call cold: a deep chill, heaviness, or dull ache, read in the tradition as cold settling where movement had stalled. The final entry needs honest translation. Inguinal lymphadenitis names inflammation and swelling of the lymph glands in the groin. Whatever the historical context of that entry, its modern meaning is unambiguous: persistently swollen, tender, or warm lumps in the groin usually accompany infections or other conditions that belong promptly with a physician. They are a reason to book an appointment, never a target for pressure.
It bears repeating plainly: these are the traditional uses recorded in a licensed dataset and classical literature, offered here for cultural and historical understanding. They are not claims that pressing Biguan treats disease, and nothing on this page replaces assessment by a qualified clinician. Where modern research touches self-applied pressure at all, reviews suggest effects are modest and context-dependent, and study specific to any single point remains thin. Nor does this page trade in comparisons between points; the current evidence cannot settle such questions, and the tradition itself rarely asked them that way. Hold the history warmly, hold the safety rules firmly, and let neither pretend to be the other.
Self-Care Acupressure at Home
With the point located by the walkthrough above, settle in: seated comfortably or lying back with a pillow under the knees, thigh loose, breath unhurried. Curl the index and middle fingers together and rest the pads — never the tips — on the spot. Begin with contact alone for a few slow breaths, then add small, slow circles, letting the skin glide over the muscle beneath rather than dragging across it. Pressure should register as pleasant dullness, gentle warmth, or a faint satisfying heaviness — never sharpness. Because the thigh is broad and padded, the contact can cover a little more area than it would on, say, the face or wrist, but the force stays modest all the same. A common home rhythm is one to three minutes per side, once or twice daily, matched where possible to slow exhales. Finish one side completely, then give the other the same unhurried attention.
Quality matters more than duration. Light, patient, regularly repeated contact fits the wellness register this page practises; hard jabbing causes harm and teaches the body nothing. Warm your hands first, because chilled muscle guards. Choose a quiet corner over a screen and let the minutes double as a pause: inhale through the nose, feel the thigh heavy under still fingers, press gently on the long exhale. Loose clothing helps, and so does anchoring the practice to an existing habit — after a morning shower, before an afternoon walk — because consistency, not intensity, is what self-care traditions actually ask for. Skip the session during feverish illness or any day the leg feels actively wrong, and set it aside over broken, irritated, or freshly shaved skin.
Treat the exercise as a small ceremony of attention rather than a treatment session. Across weeks you may notice the area feels less guarded, that the leg feels warmer and easier while you press, or perhaps nothing shifts except that you spend ninety seconds attending to 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 deeper to force a result betrays the register entirely. When curiosity pulls that way, return to gentleness, or simply stop for the day and let the gate wait, as gates have always known how to do.
Cautions and Safe Practice
The licensed record carries no cautions for this point — the dataset entry lists none — and that absence deserves careful reading rather than loud celebration. No recorded warning is not an invitation to force; it simply means the licensed sources raise no flag beyond the universal ones. The local anatomy supplies the sensible posture anyway: the front of the thigh is thick muscle over solid bone, with none of the delicate neighbors that make chest or abdominal points cautious territory, and it rewards exactly the light, superficial, patient contact this page practises. Deep driving pressure serves nothing here either; it risks bruising a large muscle and startling the person practising patience. Home acupressure stays on the surface, and on this surface almost anything gentle will do.
The practical rules gather quickly. Use finger pads only — no elbows, knuckles, fists, or tools anywhere near the routine. Keep pressure light enough that you could carry on a conversation throughout; stop at once on sharp, electric, or radiating sensation, and do not try again that day. Set the point aside over broken or irritated skin. Pregnant readers should consult a qualified practitioner before adding any new point practice, and anyone living with reduced sensation in the legs, circulatory problems such as varicose veins or a history of blood clots, or recovery from recent hip, thigh, or knee surgery should ask their clinician first. None of these rules costs the practice anything; they simply keep it honest about what it is.
And the wider rule stands over everything: this page is educational, and acupressure is self-care, not diagnosis or therapy. Seek prompt medical care — not a pressure routine — for sudden weakness, numbness, or trouble controlling a leg; difficulty walking; low-back pain accompanied by fever or changes in bladder or bowel control; a fall or injury to the hip or thigh; or a lump in the groin that is new, swollen, or tender. Persistent aching anywhere along the thigh or low back likewise belongs with a licensed practitioner, medical or East Asian medical as suits the complaint. The safest gift Biguan offers most people is a friendlier acquaintance with the strong ground they stand on — learned gently, kept in its place, and always willing to step aside for real medicine.
Biguan, the Gate of the Thigh, stands high on the front of the thigh where it meets the trunk, at the head of the stomach channel’s long descent toward the second toe. Classical practice reached here for weakness and stiffness of the lower limb, for lumbar pain, and for knees that carried a lasting chill. This guide walks through finding it by touch and pressing it gently.
Self-care limits
Frequently asked
- How do I find Biguan without knowing anything about cun?
- Use two bones as the whole map: the bony point at the front outer rim of your hip, and the outer corner of the base of your kneecap. Sit upright, imagine the diagonal between them across the front of your thigh, and search the upper stretch of that line, close to the hip fold, in the soft hollow beside the strap-like muscle that crosses there. Seated, the spot sits roughly level with the perineum — exactly what the formal description encodes.
- Is pressing the front of my thigh actually safe?
- For healthy adults, gentle fingertip contact held on the surface is generally reasonable self-care here: the quadriceps is among the most padded, best-protected territories on any channel, far from lungs, bowels, and major surface vessels. Keep the pressure conversational, use pads rather than tools, and respect the stop signals — sharp pain, radiating sensation, or worsening discomfort all mean finish immediately.
- What did classical practice use Biguan for?
- The traditional record lists atrophy and paralysis of the lower limb, lumbar pain, cold knees, and inguinal lymphadenitis. The first three belong to the old language of weak, blocked, or chilled limbs discussed along the yangming channels; the last reads today as swollen groin glands — a symptom for physicians, not self-care. These are traditional frameworks documented for cultural understanding, not evidence-backed treatment claims.
- Why is the point called a gate?
- Bi is the old word for the thigh; guan means gate or mountain pass. The point stands where the leg joins the trunk, right where the descending stomach channel steps from torso to thigh on its recorded course toward the second toe — so the namers marked the threshold with a gate, as channel maps do at many a narrow place. Treat the image as texture rather than settled doctrine; it repays the attention either way.
- Can pressing Biguan replace seeing a doctor about my leg or back?
- No. Self-acupressure is a comfort practice, not a diagnostic tool. Sudden weakness or numbness, difficulty walking, back pain with fever or bladder and bowel changes, injuries, or a new swollen lump in the groin need prompt professional assessment regardless of what any self-care page says. Daily practice lives comfortably alongside proper care downstairs; it cannot replace the consulting room upstairs.
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 channel context.
- 03aijiu-mpvue (MIT License) licensed dataset, entry for ST31 Biguan — location, 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/st31/leaf.json
- GET /zh-hant/points/st31/leaf.json
- GET /zh-cn/points/st31/leaf.json
- /llms.txt — the index of every leaf
- JSON-LD in the page: MedicalWebPage, MedicalEntity and FAQPage
{
"id": "ST31",
"name": {
"en": "Biguan",
"gloss": "Gate of the Thigh",
"zh-Hant": "髀關",
"zh-Hans": "髀关"
},
"channel": {
"id": "ST",
"order": 31,
"of": 45
},
"location": {
"text": "Straight down from the bony point at the front of the hip, level with the crotch, in a dip on the front of the thigh."
},
"for": [
"weak legs",
"low-back ache",
"cold knees"
],
"press": {
"text": "Firm thumb pressure, about a minute each leg.",
"seconds": 60,
"sides": "both"
},
"cautions": [],
"source": "Zhenjiu Jiayi Jing, book 3",
"url": "https://acupoints.com/en/points/st31",
"lastReviewed": "2026-08-24"
}