BL-48 (Yang Gang) Yang Headrope

What does BL-48 Yang Gang do?

BL-48 regulates the Gall Bladder and clears damp-heat, and it harmonises the middle jiao — and it is the only outer-line point in this stretch whose recorded action names a YANG organ.

• Regulates the Gall Bladder and clears damp-heat
• Harmonises the middle jiao

The name records exactly that, and it is checkable. BL-48 sits level with BL-19 Dan Shu, the Back-Shu point of the Gall Bladder — and the Gall Bladder is a fu, a yang organ. Every other outer-line point in this group pairs with the Back-Shu point of a zang, a yin organ, and carries a name for that organ’s spirit:

• BL-42 Po Hu — Po Door, level with BL-13, the Lung
• BL-44 Shen Tang — Spirit Hall, level with BL-15, the Heart
• BL-47 Hun Men — Hun Gate, level with BL-18, the Liver
• BL-48 Yang Gang — YANG Headrope, level with BL-19, the Gall Bladder — this point, and the odd one out
• BL-49 Yi She — Reflection Abode, level with BL-20, the Spleen
• BL-52 Zhi Shi — Will Chamber, level with BL-23, the Kidneys

The pattern breaks precisely where the organ changes type. A yang organ has no spirit in the five-spirit scheme, so BL-48 has no spirit name — it is named for the yang quality itself. That is a genuine internal consistency in the naming system, and it can be confirmed from our own records rather than taken on trust. Our BL-45 record documents the other break in the same group: its inner-line partner, BL-16 Du Shu, is not an organ Back-Shu point at all.

On the name. “Yang Gang” — Yang Headrope. A gang is the main rope of a net, the one that controls all the others when pulled; the image is of a governing or gathering cord. Combined with yang, the name reads as the controlling cord of the yang — fitting for the outer-line point of the one yang organ in the set.

Source: Sacred Lotus sources & references (channel, action, location and translation records; every outer-line point and its inner-line partner queried and the yin/yang organ pattern verified against our own data), cross-referenced against multiple online sources.

What is BL-48 Yang Gang used for?

BL-48 is used for abdominal rumbling and pain, diarrhoea, pain in the flank, and jaundice. Our own indication record is reproduced here in full.

• Borborygmus (abdominal rumbling)
• Abdominal pain
• Diarrhoea
• Pain in the hypochondriac region (the flank, under the ribs)
• Jaundice

This list is the Gall Bladder’s territory, entry by entry. Flank pain under the ribs is where the gallbladder sits; jaundice is the classical and the modern sign of biliary obstruction; the digestive entries follow bile’s role in digestion. Unusually for an outer-line point, there is no back or musculoskeletal indication at all — BL-42, BL-44, BL-47 and BL-49 all carry local back or chest entries, and BL-48 does not. Its recorded list is entirely internal.

An honest note, and the jaundice entry is the one that matters. JAUNDICE — yellowing of the skin or the whites of the eyes — ALWAYS REQUIRES PROMPT MEDICAL ASSESSMENT. It is a sign of liver, biliary or blood disease, and some of its causes are urgent. There is no circumstance in which new jaundice should be managed by a classical indication rather than investigated. Severe pain under the right ribs, especially with fever or jaundice, is a medical emergency. Persistent diarrhoea or abdominal pain requires assessment. This record documents historical use only; our DU-06 record carries the same warning for the same reason.

How it is combined. With BL-19 Dan Shu at the same level on the inner line — the inner-and-outer pairing. With GB-24 Ri Yue, the Front-Mu point of the Gall Bladder, in the front-and-back pairing. With GB-34 Yang Ling Quan, the Gall Bladder’s He-Sea point and the Hui-Meeting point for the sinews, distally. With LIV-14 Qi Men for the flank. All held here.

Source: Sacred Lotus sources & references (indication record, compared against the other outer-line records; the BL-19, BL-42, BL-44, BL-47, BL-49, DU-06, GB-24, GB-34 and LIV-14 records queried from our own data), cross-referenced against multiple online sources.

Where is BL-48 Yang Gang located?

BL-48 is on the back, three cun out from the midline, level with the lower edge of the tenth thoracic spinous process — the same level as BL-19 Dan Shu.

• 3 cun lateral to the midline, level with T10 — the outer Bladder line
• Level with BL-19 Dan Shu on the inner line at 1.5 cun, and with DU-07 Zhong Shu on the midline
• BL-47 Hun Men lies one level above at T9; BL-49 Yi She one level below at T11

The three-line arrangement at one level. DU-07 on the midline, BL-19 at 1.5 cun, BL-48 at 3 cun — three points across the back at T10, each with a different role, and this library holds records for all three. Our DU-07 record makes the anatomical half of that comparison: the midline point sits over the vertebral arch, and the off-midline points at the same level lie over the thorax with lung beneath them.

Counted, not felt. The outer Bladder line has no palpable landmark of its own, so every point on it is located by counting vertebrae and measuring laterally. Miscounting a level moves the point into a different organ’s territory while the lateral distance stays correct — the commonest error on the back, and the reason this library states the reference level on every one of these records.

On the name. “Yang Gang” — Yang Headrope, the gang being the controlling cord of a net. As set out above, the name marks this as the outer-line point of the one yang organ in the group.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; the BL-19, BL-47, BL-49 and DU-07 levels queried from our own data).

• A Manual of Acupuncture (p. 307): 3 cun lateral to the midline, level with the lower border of the spinous process of the tenth thoracic vertebra (T10) and level with Danshu BL-19.
• Chinese Acupuncture and Moxibustion (p. 186): 3 cun lateral to Zhongshu (DU-7), at the level of the lower border of the spinous process of the tenth thoracic vertebra.

How is BL-48 Yang Gang needled?

Our own record states oblique insertion of 0.3–0.5 inch, with moxibustion applicable — and this is a thoracic paravertebral point, so the general considerations of that band apply. 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: oblique, 0.3–0.5 inch — the shallow oblique angle characteristic of the thoracic back points. The obliquity is the safety feature: angling toward the spine keeps the needle in muscle with bone behind it; angling outward points it at the pleura.
• Moxibustion: recorded as applicable. It carries no pneumothorax hazard.
• Regional anatomy: latissimus dorsi and the erector spinae group overlie the point; the tenth rib and intercostal space lie deep, with the pleural recess beyond, and the liver’s upper margin in the region on the right.

What is NOT claimed here, stated precisely. The paediatric chest-CT study this library uses for measured safe depths covers 23 named points, and its outer-line coverage runs BL-41 to BL-46 — it stops before BL-47, and does not reach BL-48. Verified. No figure from it is borrowed. Our BL-45 and BL-46 records carry their own measured figures, and those are the two thinnest margins in that whole table; they belong to BL-45 and BL-46 and are not transferred two levels down to this point. The kidney-region MRI study measured BL-21, BL-22, BL-23, BL-50, BL-51 and BL-52, and does not cover BL-48 either.

Hazard, stated proportionately. This is a thoracic paravertebral point and pneumothorax is the documented hazard of the band. But no study has measured that margin at BL-48, and this record says so rather than substituting a neighbour’s number. No case report naming BL-48 was located, and none is asserted.

Source: Sacred Lotus sources & references (needling record, retained unchanged); the point lists of PMID 26922245 / PMC4769822 and the kidney-region MRI study queried from our own data and confirmed NOT to include BL-48; regional anatomy from standard anatomical description.

Is there research on BL-48, and what should a reader know?

No trial isolates BL-48. Where the point appears it is one component of a digestive or hepatobiliary protocol, and a study that includes a point in a protocol is not evidence about that point. Nothing here is offered as evidence that acupuncture treats jaundice, gallstones or any liver or biliary condition — the indication list records historical use.

What this page can state with confidence. BL-48 sits at T10 on the outer Bladder line, level with BL-19 Dan Shu, the Gall Bladder’s Back-Shu point — and because the Gall Bladder is the one yang organ in this group, BL-48 is the one point of the six with no spirit name, being named for the yang quality instead. That pattern was verified across our own outer-line records, not assumed. Its indication list is entirely internal, with no back or musculoskeletal entry, which no other point in the group can say. And no measured safe depth exists for it: the CT study’s outer-line coverage stops at BL-46.

The jaundice warning bears repeating. New yellowing of the skin or eyes needs prompt medical assessment, always. It is the one place on this page where a classical indication and modern practice diverge sharply.

A note on searching for it. “BL 48”, “UB 48” and “Yanggang” searches return protocol trials and a large volume of unrelated material — Yanggang matches place names and personal names, and the syllable yang pulls in an enormous quantity of general yin–yang material. 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 (action, indication, location and translation records; every outer-line point and its inner-line partner queried and the yin/yang organ pattern verified; the CT and MRI point lists confirmed not to include BL-48).