BL-35 (Hui Yang) Meeting of Yang

What does BL-35 Hui Yang do?

BL-35 clears damp-heat and regulates the lower jiao, and it benefits the coccyx and treats haemorrhoids — one of seven points in this library whose recorded ACTION names haemorrhoids outright, rather than leaving them to the indication list.

• Clears damp-heat and regulates the lower jiao
• Benefits the coccyx and treats haemorrhoids — a named condition stated as an action, not merely as an indication

The full set, queried from our own action records, is BL-35, BL-36, BL-54, BL-57, BL-58, DU-01 and the extra point Er Bai — a Bladder-channel cluster running from the coccyx down the back of the leg, plus the Governing Vessel point beside this one and one point on the forearm. DU-01 Chang Qiang is the nearest of them, immediately medial. The two sit within a centimetre or two of each other at the very bottom of the back — DU-01 on the midline below the coccyx tip, BL-35 half a cun to each side, level with the tip — and both carry the same explicit anorectal action. They are the classical pairing for the region, and our DU-01 record names BL-35 in turn.

Its position is unique on this channel. Every other Bladder point on the back sits on the 1.5-cun inner line or the 3-cun outer line. BL-35 alone sits at 0.5 cun from the midline — verified by querying our own location records. It is the Bladder channel’s closest approach to the Governing Vessel anywhere on the back, and that is precisely what the name records: Hui Yang, the Meeting of Yang. The Bladder channel is the great yang channel of the foot and the Governing Vessel is the sea of the yang channels; where the two nearly touch, the point is named for the meeting.

Its category record says the same thing. Our data gives BL-35’s classification simply as Meeting of Yang — unusually, the same words as its name, which is not the case for any other point in this stretch.

Source: Sacred Lotus sources & references (channel, category, action, location and translation records; every Bladder back-point lateral distance queried and BL-35 confirmed the only one at 0.5 cun; every action record carrying an explicit haemorrhoid action counted against our own data), cross-referenced against multiple online sources.

What is BL-35 Hui Yang used for?

BL-35 is used for dysentery, bloody stools, diarrhoea, haemorrhoids, abnormal vaginal discharge and impotence. Our own indication record is reproduced here in full.

• Dysentery
• Bloody stools
• Diarrhoea
• Haemorrhoids
• Morbid leucorrhoea (abnormal vaginal discharge)
• Impotence

Every entry belongs to the region the point occupies. Four are anorectal, two are urogenital, and the point sits at the base of the sacrum beside the anus. It is one of the most tightly regional indication lists in the library, matched in this respect only by DU-01 next to it — whose list is five-sevenths anorectal.

An honest note, and it is the most important passage on this page. BLOODY STOOLS REQUIRE MEDICAL ASSESSMENT AND SHOULD NEVER BE ASSUMED TO BE HAEMORRHOIDS. Rectal bleeding is also the presenting sign of conditions that are treatable when found early and not when they are not, and attributing it to piles without examination is the specific error this warning exists to prevent. Dysentery — diarrhoea with blood and fever — is a serious infection requiring medical care, and diarrhoea in general causes dehydration that needs attention, particularly in the very young and the elderly. Erectile difficulty warrants medical assessment, since it can be an early sign of cardiovascular or endocrine disease. This record documents classical use; it makes no claim that acupuncture treats any of these.

How it is combined. With DU-01 Chang Qiang immediately medial — the classical pairing for the region, both carrying an explicit haemorrhoid action. With BL-57 Cheng Shan on the calf, the classical distal haemorrhoid point. With BL-31 to BL-34, the liao points, above it on the sacrum. With DU-20 Bai Hui at the vertex for prolapse and sinking qi. All held here.

Source: Sacred Lotus sources & references (indication and action records; the DU-01, DU-20, BL-31 to BL-34 and BL-57 records queried from our own data), cross-referenced against multiple online sources.

Where is BL-35 Hui Yang located?

BL-35 is at the very bottom of the back, half a cun to each side of the midline, level with the tip of the tailbone.

• 0.5 cun lateral to the Governing Vessel, level with the tip of the coccyx
• DU-01 Chang Qiang lies on the midline below the coccyx tip; DU-02 Yao Shu at the sacral hiatus above
• BL-34 Xia Liao, the lowest of the liao points, lies above and lateral

The 0.5-cun measurement is what makes this point distinctive, and it is verifiable. Querying every Bladder back-point location in our records, BL-35 is the only one at 0.5 cun from the midline. All the others are on the 1.5-cun inner line or the 3-cun outer line. A reader who assumes the familiar inner line continues down to the coccyx will place BL-35 three times too far out — the same class of error our BL-09 record describes, where the scalp run drops from 1.5 cun to 1.3 cun at the occiput.

The coccyx tip is a real landmark, palpable at the base of the sacrum, so BL-35 is located by feature rather than by counting — an advantage it shares with the liao points above it and with DU-02 at the hiatus.

A necessary practical note. This is an intimate location, close to the anus. Any examination or treatment here calls for the same standards of consent, draping, privacy and professional conduct that apply to any examination of that region, and in many settings a chaperone. This record describes a location in a reference work; it is not a suggestion that a reader locate or treat this point on themselves or anyone else. Our DU-01 record carries the same note for the same reason.

On the name. “Hui Yang” — Meeting of Yang. Hui is to meet or gather, the same character as in the Hui-Meeting influential points and in DU-20 Bai Hui (Hundred Meetings). Here it marks where the great yang channel comes closest to the vessel that governs all the yang channels.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; every Bladder back-point lateral distance queried, and the DU-01, DU-02, DU-20, BL-09 and BL-34 records checked against our own data).

• A Manual of Acupuncture (p. 296): 0.5 cun lateral to the Governing vessel, level with the tip of the coccyx.
• Chinese Acupuncture and Moxibustion (p. 183): On the sacrum, 0.5 cun lateral to the tip of the coccyx.

How is BL-35 Hui Yang needled?

Our own record states perpendicular insertion of 0.5–1.0 inch, with moxibustion applicable — and the structure that governs this point, as at DU-01 beside it, is the RECTUM. 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, 0.5–1.0 inch — shallower than the 0.8–1.2 inches recorded at the liao points above.
• Moxibustion: recorded as applicable.
• Regional anatomy: gluteus maximus and the anococcygeal region lie superficially; the anal canal and rectum lie anteriorly, close to the midline; the inferior rectal branches of the pudendal nerve and the inferior rectal vessels supply the region; the coccyx and the sacrotuberous ligament lie deep and medial.

Hazard, stated proportionately and precisely. There is no body cavity and no great vessel here, but there is a hollow organ close in front, and the recorded depth is what keeps the needle behind it. That places BL-35 in the same small group as DU-01, ST-42 and LU-08 — points where the anatomy immediately in front of or beneath the needle, rather than the depth in isolation, is the operative fact. Our DU-01 record makes the same statement about the same structure from half a cun away. This is also a region of high sensitivity, and the consent and professional-conduct standards noted above apply.

What is not claimed. No study measuring a safe depth at BL-35 could be located, and none is borrowed. The paediatric CT study this library uses covers 23 points on the trunk and shoulder, from DU-09 upward, and does not reach the sacrum or the coccyx. No case report naming BL-35 was located, and none is asserted.

Source: Sacred Lotus sources & references (needling record, retained unchanged, and the liao-point depths compared; the DU-01, ST-42 and LU-08 records and the point list of PMID 26922245 / PMC4769822 queried from our own data), cross-referenced against multiple online sources; regional anatomy from standard anatomical description.

Is there research on BL-35, and what should a reader know?

No trial isolates BL-35. Where the point appears it is one component of an anorectal or pelvic protocol, and a study that includes a point in a protocol is not evidence about that point.

Haemorrhoids and post-haemorrhoidectomy pain are where a reader will meet claims near this point, and those protocols typically combine BL-35 with DU-01 and BL-57. Nothing here is offered as evidence of effect, and the warning above stands regardless: rectal bleeding needs assessment before it is called haemorrhoids.

What this page can state with confidence. BL-35 sits 0.5 cun from the midline — the only Bladder point on the back at that distance, verified against every location record we hold, and the reason a reader following the familiar 1.5-cun line down to the coccyx will miss it. Its name records that closeness: the great yang channel meeting the vessel that governs the yang channels. It is one of seven points whose recorded action names haemorrhoids outright — BL-35, BL-36, BL-54, BL-57, BL-58, DU-01 and Er Bai, queried from our own action records. And the anatomical fact governing it is the rectum in front, the same fact that governs DU-01.

A note on searching for it. “BL 35”, “UB 35” and “Huiyang” searches return protocol trials and a large volume of unrelated material — Huiyang is a district name and a common element in company names. 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 location records; every Bladder back-point lateral distance and the DU-01 and BL-57 records queried and verified against our own data).