BL-26 (Guan Yuan Shu) Origin Pass Shu

What does BL-26 Guan Yuan Shu do?

BL-26 strengthens the lumbar region and regulates the lower jiao — and its name is not an organ’s. It is another point’s.

• Strengthens the lumbar region — the local action at the fifth lumbar level
• Regulates the lower jiao — the action behind its urinary and bowel indications

Named after a point on the front of the body, and this is checkable. REN-04 Guan Yuan — Origin Pass — sits on the lower abdomen and is one of the most weighted points on the Conception Vessel. BL-26 is Guan Yuan Shu, Origin Pass Shu: the shu point of Guan Yuan. Our record also holds “Gate of Origin Shu” as a second designation, the same relationship stated again.

It is not alone, and the pair is worth knowing. Querying every -shu name on this channel returns nineteen, and exactly two are named after Conception Vessel points rather than after organs:

• BL-24 Qi Hai Shu — Sea of Qi Shu, after REN-06 Qi Hai, Sea of Qi
• BL-26 Guan Yuan Shu — Origin Pass Shu, after REN-04 Guan Yuan, Origin Pass — this point

Both names and both translations were confirmed by query. Two points on the back of the lower trunk carrying, unaltered, the names of two points on the front — a structural echo across the two midline systems that the naming makes explicit.

What that means for reading a point list. Twelve of the nineteen -shu names on this channel are organ Back-Shu points; seven are not — BL-16 Du Shu, BL-17 Ge Shu, BL-24, BL-26, BL-29, BL-30 and BL-43 Gao Huang Shu. Our DU-02 record documents the same trap on the Governing Vessel, where shu in a name signals nothing about classification. Here the proportion is roughly two in three — usually an organ, but not reliably.

Source: Sacred Lotus sources & references (channel, category, action, location and translation records; every -shu name on this channel queried and sorted, and the REN-04, REN-06 and BL-24 names and translations confirmed, against our own data), cross-referenced against multiple online sources.

What is BL-26 Guan Yuan Shu used for?

BL-26 is used for low back pain and sciatica, for abdominal distension and diarrhoea, and for bed-wetting and frequent urination. Our own indication record is reproduced here in full.

• Low back pain
• Sciatica
• Abdominal distension
• Diarrhoea
• Enuresis (bed-wetting)
• Frequent urination

Note that our record names sciatica outright. Most of this channel’s leg indications are phrased as pain, numbness or motor impairment of the lower extremities — our BL-36, BL-37 and BL-55 records all use that formula. BL-26 uses the modern diagnostic term directly, which is uncommon in our indication data and worth noticing, because a named condition and a description of symptoms are not the same kind of claim.

The urinary group sits where the anatomy puts it. The fifth lumbar level is immediately above the sacrum, from which the nerves supplying the bladder emerge. Our BL-31 and BL-53 records set out that correspondence for the sacral points; BL-26 is at the top of the same region.

An honest note. Low back pain with leg weakness, saddle numbness or any change in bladder or bowel control is a medical emergency requiring immediate assessment. That combination is close to what this indication list describes, which is precisely why it is stated here. Sciatica that is severe, worsening, or accompanied by weakness needs medical assessment. New frequent urination requires assessment — it can be an early sign of diabetes or of urinary or prostate disease. Bed-wetting in a child that is new, or that returns after a dry period, warrants medical review. This record documents classical use and should not delay any of that.

How it is combined. With REN-04 Guan Yuan on the lower abdomen — the point it is named for, and the front-and-back pairing the name itself suggests. With BL-25 Da Chang Shu above and BL-27 Xiao Chang Shu below on the same line. With BL-23 Shen Shu for the urinary indications. With BL-40 Wei Zhong distally for the back. All held here.

Source: Sacred Lotus sources & references (indication record, compared against the other leg-indication records on this channel; the BL-23, BL-25, BL-27, BL-31, BL-36, BL-37, BL-40, BL-53, BL-55 and REN-04 records queried from our own data), cross-referenced against multiple online sources.

Where is BL-26 Guan Yuan Shu located?

BL-26 is on the lower back, an inch and a half out from the midline, level with the lower edge of the fifth lumbar spinous process — the last lumbar level, immediately above the sacrum.

• 1.5 cun lateral to the midline, level with L5 — the inner Bladder line
• BL-25 Da Chang Shu lies one level above at L4; BL-27 Xiao Chang Shu below at the first sacral level
• BL-53 Bao Huang and the outer line lie further out at 3 cun

L5 is the easiest lumbar level to reach by counting, because the check is right beside it. The intercristal line between the tops of the hip bones crosses the spine at about L4, where BL-25 and DU-03 sit — so BL-26 is one level below a landmark that can be found by feel rather than by counting down from the neck. Our DU-03 record sets that landmark out in full. On a stretch of back where counting error is the commonest fault, being one step from an independent reference matters.

Note what is not beside it on the midline. There is no Governing Vessel point at L5 — DU-03 sits at L4 and DU-02 at the sacral hiatus below. So at BL-26’s level the usual three-line arrangement across the back is incomplete, as it also is at T12. Confirmed by query, and our DU-03 and DU-06 records set out those gaps.

On the name. “Guan Yuan Shu” — Origin Pass Shu. Guan is a gate or pass, as in DU-03 Yao Yang Guan and P-06 Nei Guan; yuan is the origin or source. The name belongs to REN-04 on the front of the body, and this point carries it with shu added.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; the BL-25, BL-27, BL-53, DU-02, DU-03 and REN-04 records queried, and the absence of an L5 Governing Vessel point confirmed, against our own data).

• A Manual of Acupuncture (p. 288): 1.5 cun lateral to the lower border of the spinous process of the fifth lumbar vertebra (L5).
• Chinese Acupuncture and Moxibustion (p. 181): 1.5 cun lateral to the Governor Vessel, at the level of the lower border of the spinous process of the fifth lumbar vertebra.

How is BL-26 Guan Yuan Shu needled?

Our own record states perpendicular insertion of 0.8–1.2 inches, with moxibustion applicable — deeper than the thoracic points above, and matching the other lumbosacral points on this line. What follows is a neutral record of what the reference literature documents. It is not instruction, and this page does not teach technique.

• Angle and depth as recorded: perpendicular, 0.8–1.2 inches — against the 0.3–0.5 inch oblique recorded across the thoracic back points. The lumbar erector spinae is the thickest paravertebral muscle mass in the body, and the recorded depths track that.
• Moxibustion: recorded as applicable.
• Regional anatomy: the thoracolumbar fascia and the bulk of erector spinae overlie the point; the lumbar vertebral arch and the sacrum lie beneath; the dorsal rami of the lumbar nerves supply the region. The spinal cord has already ended well above this level — at approximately L1–L2 in adults — so within the canal here lie the cauda equina and the dural sac only.

No pleura, and no kidney either. Two hazards this library documents elsewhere on this channel do not reach BL-26. The pneumothorax band is thoracic, ending well above; the kidney spans roughly the twelfth thoracic to third lumbar levels, so it lies above this point too — our BL-50, BL-51 and BL-52 records carry the kidney-region measurements and they belong to those points. Stating what does not apply is as useful as stating what does.

What is not claimed. No study measuring a safe depth at BL-26 could be located, and none is borrowed. The paediatric chest-CT study covers 23 points on the trunk and shoulder from DU-09 upward; the kidney-region MRI measured BL-21, BL-22, BL-23, BL-50, BL-51 and BL-52. Neither includes BL-26. Verified. No case report naming BL-26 was located.

Source: Sacred Lotus sources & references (needling record, retained unchanged, and the thoracic depths compared; the BL-50, BL-51 and BL-52 records and the point lists of PMID 26922245 and PMID 36075596 queried and confirmed not to include BL-26), cross-referenced against multiple online sources; regional anatomy from standard anatomical description.

Is there research on BL-26, and what should a reader know?

No trial isolates BL-26. Where the point appears it is one component of a low-back or urinary protocol, and a study that includes a point in a protocol is not evidence about that point.

Low back pain has one of the largest acupuncture literatures in existence, and the lumbar Bladder points appear throughout it — almost always in multi-point protocols built around BL-23, BL-25, BL-40 and local ashi points. Evidence about a protocol is not evidence about a point within it, and none of it is claimed here.

What this page can state with confidence. BL-26 sits at L5 on the inner Bladder line, one level below the intercristal landmark. It is one of only two points on this channel named after a Conception Vessel point rather than an organ — with BL-24 Qi Hai Shu after REN-06, and this one after REN-04 — confirmed by querying every -shu name we hold. Twelve of those nineteen names are organ Back-Shu points and seven are not, so a -shu ending signals an organ about two times in three and cannot be relied on. And its indication list names sciatica outright, which is uncommon in our data, where leg symptoms are usually described rather than diagnosed.

A note on searching for it. “BL 26”, “UB 26” and “Guanyuanshu” searches return protocol trials and unrelated material — and there is a specific trap: “Guan Yuan” without the shu is REN-04, a different and far more commonly used point on the front of the body. A search or a prescription that drops the suffix lands on the wrong point entirely. Our library codes this channel BL- while some sources use UB-. Any claim attached to this point should be checked against what a study actually used.

Source: Sacred Lotus sources & references (category, action, indication and translation records; every -shu name on this channel queried and sorted, and the REN-04, REN-06 and BL-24 records confirmed, against our own data).