SJ-06 (Zhi Gou) Branch Ditch

What does SJ-06 Zhi Gou do?

Zhi Gou SJ-06 is the Jing-River and Fire point of the San Jiao Channel of Hand Shao Yang, and its most distinctive recorded action is one no other arm point is famous for: it moves the stool. The rest of its range is what the classification predicts — regulating qi and clearing heat throughout the three burners, and treating the flank, the chest and the ear along the Shao Yang line. But it is the constipation indication that has kept this point in constant use for a thousand years, and it is worth stating at the outset because it is the thing a reader is most likely to have come here for.

• Regulates qi and clears heat in the three jiao — the channel-wide action. The San Jiao is described as the passage through which qi and fluids move between the upper, middle and lower burners, and SJ-06 is the point on it most associated with keeping that passage open.
• Moves the stool — the action the point is best known for, and an unusual one for a point on the forearm. The reasoning recorded in the classics is that constipation of the qi-stagnation type is a failure of downward movement in the lower burner, and that the San Jiao channel reaches the lower burner as a whole rather than the bowel as an organ.
• Benefits the chest and the lateral costal region — for pain, distension and fullness in the flank and rib-side, the Shao Yang territory. This is the recorded basis for its classical use in herpes zoster of the trunk and in pleuritic-type flank pain.
• Benefits the voice and the ear — for sudden hoarseness or loss of voice, and for tinnitus and deafness, the ear being the region the Shao Yang channels dominate.
• Activates the channel and alleviates pain — its local and channel role for the forearm, elbow and shoulder, and for the heavy, aching shoulder and upper back the reference literature records for it.
• Clears heat in febrile disease — the Jing-River points are classically associated with cough, dyspnoea, chills and fever, and this is where SJ-06's febrile indications come from.

Source: Sacred Lotus sources & references (channel, five-shu and element classification, and the existing action record); Deadman & Al-Khafaji, A Manual of Acupuncture, p. 398; Chinese Acupuncture & Moxibustion, p. 204; Nan Jing (Classic of Difficulties) on the five-shu indications; cross-referenced against multiple online sources.

What is SJ-06 Zhi Gou used for?

SJ-06 is used for three things above all: constipation, pain in the flank and rib-side, and disorders of the ear and voice. The indications carried in Sacred Lotus sources & references are tinnitus, deafness, hypochondriac pain, vomiting, constipation, febrile disease, aching and heaviness of the shoulder and back, and sudden hoarseness. The wider reference literature sets the list out as below. These describe traditional use, not proven treatment.

• Constipation, particularly of the qi-stagnation type
• Pain and distension in the hypochondrium (the flank and rib-side)
• Fullness and oppression of the chest
• Tinnitus and sudden deafness
• Sudden hoarseness or loss of the voice
• Vomiting
• Febrile disease with fever and no sweating
• Aching, heaviness and stiffness of the shoulder and upper back
• Pain along the outer forearm and elbow; motor impairment of the arm
• Herpes zoster affecting the trunk and flank
• Abdominal distension after surgery, and delayed return of bowel movement
• Swelling and pain of the neck; scrofula

Source: Sacred Lotus sources & references (existing indication record); Chinese Acupuncture & Moxibustion, p. 204; Deadman & Al-Khafaji, A Manual of Acupuncture, p. 398.

Where is SJ-06 Zhi Gou, and how is it used in practice?

Zhi Gou sits on the back of the forearm, three cun above the wrist crease, in the channel between the two forearm bones — the radius and the ulna — on the thumb side of the extensor digitorum muscle. It is found by measuring up from SJ-04 Yang Chi at the wrist along the line running toward the point of the elbow. The point is easy to locate and easy to remember because it sits one cun above SJ-05 Wai Guan, the far more famous point in the same groove: Wai Guan is two cun above the wrist, Zhi Gou is three. Directly across the same level on the ulnar side lies SJ-07 Hui Zong, the channel's Xi-Cleft point, on the radial border of the ulna. All three are held in Sacred Lotus sources & references.

Which points is SJ-06 combined with for constipation?

The classical answer is SJ-06 with ST-25 Tian Shu, and it is a properly reasoned pairing rather than a habit. ST-25 is the Front-Mu point of the Large Intestine, sitting two cun to either side of the navel directly over the bowel; SJ-06 is the distal point on the arm that moves qi in the lower burner. The combination is the standard proximal-and-distal structure — local point over the organ, distal point on a limb — applied to the bowel. Its usual companions are:

• With BL-25 Da Chang Shu — the Back-Shu point of the Large Intestine, beside the fourth lumbar vertebra. Adding it to ST-25 gives the classical Front-Mu and Back-Shu pairing, front and back of the same organ, with SJ-06 as the distal point. Both are held here.
• With ST-37 Shang Ju Xu — the Lower He-Sea point of the Large Intestine, the point the Ling Shu designates for bowel disorders specifically. Held here. A data-mining review of acupoint prescriptions for opioid-induced constipation in cancer pain found Shang Ju Xu with Zhi Gou and Zu San Li among the point groupings showing the highest compatibility in that literature (PMID 38439874).
• With ST-36 Zu San Li — the Stomach channel's He-Sea point and the general point for the abdomen, added to almost every bowel prescription.
• With REN-06 Qi Hai — for constipation with qi deficiency, where the difficulty is weakness of propulsion rather than stagnation.

What else is SJ-06 combined with?

• With GB-34 Yang Ling Quan — the classic pairing for hypochondriac pain and for herpes zoster of the flank, joining the two Shao Yang channels, hand and foot. GB-34 is the Hui-Meeting Point of the Sinews.
• With SJ-05 Wai Guan — its immediate neighbour and the channel's Connecting point and Confluent point of the Yang Linking Vessel. The two are often needled together, or SJ-05 substituted for SJ-06, in Shao Yang complaints of the head and side.
• With SJ-03 Zhong Zhu and SJ-17 Yi Feng — for tinnitus and deafness, joining the distal Shu-Stream point and the local point behind the ear.
• With SJ-10 Tian Jing — the channel's He-Sea and Earth point, classically associated with dissolving nodules, added for scrofula.
• Method — Sacred Lotus sources & references record moxibustion as applicable at this point.

Where does SJ-06 sit among its category peers?

SJ-06 is the Jing-River and Fire point of its channel. Sacred Lotus sources & references carry the full San Jiao five-shu series, and reading it in order shows the scheme cleanly: SJ-01 Guan Chong (Jing-Well, Metal), SJ-02 Ye Men (Ying-Spring, Water), SJ-03 Zhong Zhu (Shu-Stream, Wood), SJ-06 Zhi Gou (Jing-River, Fire) and SJ-10 Tian Jing (He-Sea, Earth). That is the yang-channel sequence — Metal, Water, Wood, Fire, Earth from the fingertip upward. One further point of the series is worth noticing: SJ-04 Yang Chi is the channel's Yuan-Source point, and on the yang channels the Source point is a separate point sitting between the Shu-Stream and the Jing-River, where on the yin channels the Source point and the Shu-Stream point are the same point. That is why SJ-04 is not on the five-shu list above.

Source: Sacred Lotus sources & references (location records, five-shu and element classifications, and the SJ-01 to SJ-10, ST-25, ST-36, ST-37, BL-25, GB-34, REN-06 and SJ-17 records queried directly); Deadman & Al-Khafaji, A Manual of Acupuncture, p. 398; Chinese Acupuncture & Moxibustion, p. 204; Ling Shu (Spiritual Pivot) on the Lower He-Sea points; PubMed PMID 38439874; cross-referenced against multiple online sources.

Where is SJ-06 located?

• A Manual of Acupuncture (p. 398): 3 cun proximal to Yangchi SJ-4, in the depression between the radius and the ulna, on the radial side of the extensor digitorum communis muscle.
• Chinese Acupuncture and Moxibustion (p. 204): 3 cun proximal to the dorsal crease of the wrist, on the line connecting Yangchi (SJ-4) and the tip of olecranon, between the radius and ulna, on the radial side of m. extensor digitorum.

How is SJ-06 Zhi Gou needled in the textbooks?

Reference record only — this sets out what the standard texts document, not instruction for a reader. Said plainly at the outset: SJ-06 is a low-hazard point. Sacred Lotus sources & references record perpendicular insertion of 0.8 to 1.2 inches, with moxibustion applicable. Deadman & Al-Khafaji record a comparable perpendicular range. The forearm contains no body cavity, and this point is a long way from the chest, the abdomen and the skull.

• Angle documented: perpendicular into the gap between the radius and the ulna.
• Depth documented: approximately 0.8–1.2 cun — a slightly deeper recorded range than at SJ-05 Wai Guan one cun below it, reflecting the thicker muscle belly at this level.
• Moxibustion: documented as applicable.

Safety reference — the measured anatomy. The structures that bound this point are entirely local and are known precisely, and they are the same set that governs its neighbour SJ-05. A perpendicular needle enters the extensor muscles of the back of the forearm — extensor digitorum superficially and, deeper, the muscles of the deep extensor layer including extensor pollicis longus — and comes to the interosseous membrane, the sheet of connective tissue slung between the two forearm bones. That membrane is the practical floor for an ordinary perpendicular insertion, and it is the anatomical reason for the recorded depth range. Running on the back surface of the membrane at this level are the posterior interosseous nerve — the deep motor branch of the radial nerve — and the posterior interosseous artery. Contact with the nerve is documented as producing a strong sensation radiating along the forearm; the reference literature describes this as a signal to withdraw rather than as a treatment goal.

The events recorded at forearm points are correspondingly minor: local bruising, needling soreness in muscle, and the transient radiating sensation just described. None is in the class of the pneumothorax risk that attends points over the thorax and upper back, or the orbital risk that attends the deep eye points. No pregnancy caution is recorded at SJ-06 in the standard references — that caution attaches to certain other points and should not be transferred here by assumption. Standard clean-needle practice applies. Acupuncture is carried out only by a qualified, licensed practitioner; this record documents the literature and is not a technique guide.

Source: Sacred Lotus sources & references (existing needling record); Chinese Acupuncture & Moxibustion, p. 204; Deadman & Al-Khafaji, A Manual of Acupuncture, p. 398 (surface and deep anatomy of the posterior forearm).

What does the name Zhi Gou mean?

Zhi Gou means "Branch Ditch" — zhi, a branch or limb, and gou, a ditch, gutter or trench. The gou is literal: the point lies in the long groove between the radius and the ulna on the back of the forearm, which is as close to a ditch as the surface of the body offers. The zhi carries two readings recorded in the commentaries — the limb itself, since this is a ditch on a branch of the body, and the branching of the channel's qi at this level. The point also carries the classical alternative name Fei Hu, "Flying Tiger", a name it shares with a hand position used in measurement, and the alternative Fei Chu. Of all the point names on the arm this is one of the most purely topographical: it tells you where the point is and nothing about what it does.

Why is SJ-06 the Fire point on a Fire channel?

Because on a yang channel the Jing-River point falls on Fire, and the San Jiao is itself a Fire channel — which makes SJ-06 the channel's horary point, the point at which the channel is treated in its own element. The logic is worth setting out fully, because it is the same scheme that runs through every channel on this site and the yang and yin versions of it are easily confused.

• The five Shu-Transporting points run from the fingertip or toe-tip up to the elbow or knee, in a fixed order: Jing-Well, Ying-Spring, Shu-Stream, Jing-River, He-Sea. The metaphor is water — a spring emerging, gathering into a stream, becoming a river, entering the sea.
• On the yin channels the elements run Wood, Fire, Earth, Metal, Water. So on a yin channel the Ying-Spring point is the Fire point. Our records for HT-08 Shao Fu and LIV-02 Xing Jian set out exactly that: both are Ying-Spring and Fire points, and both are the heat-clearing points of their channels.
• On the yang channels the elements run Metal, Water, Wood, Fire, Earth. So on a yang channel the Jing-River point is the Fire point — and that is SJ-06.
• The horary point is the five-shu point whose element matches the element of its own channel. The Heart is a Fire organ and HT-08 is the Fire point of the Heart channel, so HT-08 is the Heart's horary point. The San Jiao is likewise a Fire channel, and SJ-06 is its Fire point — so SJ-06 is the San Jiao's horary point, the point the five-element method selects when the channel is treated in its own element rather than through a controlling or generating one.

Two channels on each side of the yin/yang divide carry Fire in this way: Heart and Pericardium among the yin, Small Intestine and San Jiao among the yang. That is the origin of the tradition's "Emperor Fire and Minister Fire" distinction, with the Heart as sovereign and the San Jiao and Pericardium as its ministers.

Is there research on SJ-06 Zhi Gou?

SJ-06 is better served than most points, because the indication it is famous for — constipation — has actually been tested at this point on its own. The evidence is limited, mostly Chinese-language and mostly older, and none of it establishes clinical effectiveness. But it is genuinely point-specific, which is rare.

• Single-point multi-centre randomised trial for constipation. Patients with constipation attributed to qi stagnation or qi deficiency were randomised to electroacupuncture at Zhi Gou SJ-06 alone or electroacupuncture at a non-acupoint, for four weeks, with follow-up at one and three months. The SJ-06 group showed greater improvement in symptom scores and colonic transit time and lower use of laxatives and suppositories, with a reported effective rate of 94.4 per cent against 61.3 per cent (Zhang ZL et al., Zhongguo Zhen Jiu 2007;27(7):475–8, PMID 17722820). This is the most point-specific trial available for SJ-06 and it is the reason the constipation indication is more than folklore — though it is an unblinded trial with a very high reported response rate, and effective-rate figures of that magnitude should be read with caution.
• Adhesive ileus, randomised trial. Forty patients were randomised to electroacupuncture at bilateral SJ-06 and ST-36 or at non-acupoint sites 0.5–1 cm away from those points, twice daily for four days alongside standard care. The acupoint group had shorter times to first passage of flatus (51.4 vs 101.9 hours), first defecation (82.7 vs 154.7 hours) and first solid food (119.7 vs 232.0 hours), with no significant difference in conversion to surgery or readmission (Wen Q et al., Zhongguo Zhen Jiu 2012;32(11):961–5, PMID 23213976). Small, single-centre, and a two-point protocol.
• Postoperative ileus, larger randomised trial in a major journal. One hundred and sixty-five patients undergoing elective laparoscopic surgery for colonic and upper rectal cancer were randomised to electroacupuncture, sham acupuncture or no acupuncture on postoperative days one to four, using ST-36 Zu San Li, SP-06 San Yin Jiao, LI-04 He Gu and SJ-06 Zhi Gou. Time to defecation was shorter with electroacupuncture than with no acupuncture (85.9 vs 122.1 hours) and than with sham (85.9 vs 107.5 hours), with shorter hospital stay and less analgesic requirement (Ng SSM et al., Gastroenterology 2013;144(2):307–13, PMID 23142625). A well-conducted sham-controlled trial — but a four-point protocol, so it tests the prescription, not this point.
• Prescription analysis. The data-mining review of acupoint selection for opioid-induced constipation in cancer pain, which placed Shang Ju Xu, Zhi Gou and Zu San Li among the highest-compatibility groupings, is at PMID 38439874. This documents prescribing practice, not effect.

One study was found and dropped. A 2021 data-mining paper on acupoint selection for functional constipation, which listed Zhi Gou among the five most frequently used points, has since been retracted by the publishing journal and is therefore not cited here. It is mentioned only so that readers who encounter it elsewhere know its status.

What none of this supports is a claim that SJ-06 treats constipation, ileus, tinnitus or flank pain. The fair summary is that the classical constipation indication has been carried into modern trial design, that a single-point trial and two multi-point trials reported positive bowel outcomes, and that the point's standing otherwise rests on the classical and clinical record.

How does SJ-06 compare with the points around it?

SJ-05 Wai Guan lies one cun below it in the same groove and is by far the busier point: the channel's Connecting point and the Confluent point of the Yang Linking Vessel, used for external contractions with fever, one-sided headache and the whole Shao Yang line. Where SJ-05 opens the exterior, SJ-06 moves the interior. SJ-07 Hui Zong sits at the same level but on the ulnar side, and is the channel's Xi-Cleft point — the classical choice in acute and painful conditions, and specifically recorded for sudden deafness. SJ-04 Yang Chi at the wrist is the Yuan-Source point. SJ-03 Zhong Zhu on the back of the hand is the Shu-Stream and Wood point, and the more usual distal choice for ear disorders. For constipation approached from the abdomen rather than the arm, the points are ST-25 Tian Shu and SP-15 Da Heng; from the back, BL-25 Da Chang Shu; from the leg, ST-37 Shang Ju Xu. All are held here.

Source: Sacred Lotus sources & references (name, channel, five-shu and element classifications, and the SJ-03, SJ-04, SJ-05, SJ-07, SJ-10, HT-08, LIV-02, ST-25, ST-37, SP-15 and BL-25 records queried directly); Deadman & Al-Khafaji, A Manual of Acupuncture, p. 398; Chinese Acupuncture & Moxibustion, p. 204; Nan Jing (Classic of Difficulties) on the five-shu points; PubMed PMID 17722820, 23213976, 23142625, 38439874 — each verified resolvable and checked for retraction status before citation; one further data-mining paper was excluded after being found retracted; cross-referenced against multiple online sources.