LIV-08 (Qu Quan) Spring at the Bend

What does LIV-08 Qu Quan do?

Qu Quan LIV-08 is the He-Sea and Water point of the Liver channel of Foot Jue Yin, and it is the tradition's principal point for nourishing the Liver rather than for moving or draining it. That distinction is the whole point of the page. Most well-known Liver points — LIV-03 Tai Chong, LIV-02 Xing Jian, LIV-14 Qi Men — are reached for when Liver qi is stuck or Liver fire is rising, and their action is to move, spread or clear. LIV-08 is the one that goes the other way: it is the Liver's own tonification point, chosen when Liver blood and Liver yin are judged depleted. It sits at the inner end of the knee crease, in the fold made when the knee bends.

• Nourishes Liver blood and yin — the defining action and the one that follows directly from the classification. It is the point selected for the dryness, brittleness and depletion pattern: dry eyes, blurred vision, scanty menstruation, cramping of the sinews, dizziness attributed to blood deficiency.
• Clears damp-heat from the lower burner — the second recorded action, and the one that dominates its indication list. The Liver channel encircles the genitals, so damp-heat descending in it produces genital itching, discharge, painful or scanty urination and swelling of the external genitalia.
• Benefits the genitals — recorded in our own data as a distinct action, covering pain, itching and swelling of the genital region in both sexes, and impotence and seminal emission in men.
• Invigorates blood and benefits the uterus — recorded for lower abdominal pain, masses, prolapse of the uterus and menstrual disorders attributed to stagnation or depletion of blood.
• Relaxes the sinews and benefits the knee — the local action. The Liver governs the sinews in Chinese physiology, and this is a Liver point sitting directly on a joint, so the local and the systemic reasoning coincide here as they rarely do.

Why does being the He-Sea and Water point matter?

The five transporting points describe channel qi as water moving inward from the tip of the limb: welling at the Jing-Well, gliding at the Ying-Spring, pouring at the Shu-Stream, flowing at the Jing-River, and entering the deep at the He-Sea. He-Sea points sit at or near the elbow and knee and are where the classics say the qi of the channel joins the interior — which is why the Nan Jing assigns them to counterflow qi and diarrhoea, and why the He-Sea points as a group are the five-shu members most associated with the organ rather than the surface of the channel.

The element assignment does the rest of the work. On yin channels the sequence runs Wood – Fire – Earth – Metal – Water, so the He-Sea point is always the Water point. The Liver is the yin Wood channel, and in the generating cycle Water is the mother of Wood. A Water point on a Wood channel is therefore the mother point, the tonification point of that channel — the classical selection when the Liver itself is deficient. This is the same arithmetic that makes ST-44 a Water point on a yang Earth channel (there it lands on the Ying-Spring and clears heat) and HT-08 a Fire point on a yin Fire channel; the scheme is consistent, and reading it correctly is what tells a practitioner which of a channel's points to reach for.

Source: Sacred Lotus sources & references (channel, five-shu and element classifications; existing action and indication records); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 485); Chinese Acupuncture & Moxibustion (pp. 223–224); Nan Jing (Classic of Difficulties), on the five-shu indications and the mother–child rule; cross-referenced against multiple online sources.

What is LIV-08 Qu Quan used for?

Qu Quan LIV-08 is used above all for disorders of the genitals and the lower abdomen — itching, pain, discharge and urinary difficulty — and for the depletion patterns the tradition attributes to deficient Liver blood and yin, together with local pain at the inner knee. The indications carried in Sacred Lotus sources & references are prolapse of the uterus, lower abdominal pain, retention of urine, nocturnal emission, pain in the external genitalia, itching of the vulva, and pain in the medial aspect of the knee and thigh; the standard reference literature sets them out more fully below. These describe traditional use, not proven treatment.

• Itching of the genitals (pruritus vulvae) and of the perineum
• Pain and swelling of the external genitalia
• Prolapse of the uterus
• Lower abdominal pain and distension
• Retention of urine and difficult urination
• Vaginal discharge
• Nocturnal emission and impotence
• Irregular or scanty menstruation
• Pain in the medial aspect of the knee and thigh
• Inability to flex or extend the knee
• Cramping and contraction of the sinews
• Dry eyes and blurred vision attributed to deficient Liver blood
• Dizziness and headache attributed to deficient Liver blood
• Diarrhoea containing undigested food (recorded in the classical literature for He-Sea points)

Source: Sacred Lotus sources & references (existing indication record); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 485); Chinese Acupuncture & Moxibustion (pp. 223–224).

Where is LIV-08 Qu Quan, and how is it used in practice?

Qu Quan sits at the inner end of the crease behind the knee — bend the knee, and it is at the medial end of that fold, just in front of the two prominent tendons that stand out on the inner side of the back of the knee. Flexing the knee is what makes the point findable: the crease appears, the tendons tighten, and the point drops into the soft hollow immediately in front of them. Our two location records agree on this and are retained unchanged; one adds that it lies behind the bony prominence at the inner side of the top of the shin, the other that it is about one cun in front of KI-10 Yin Gu, the He-Sea point of the Kidney channel, which occupies the equivalent position between the same two tendons. No conflict arises between our records, and nothing in the reference literature contradicts either.

Which points is LIV-08 combined with?

• With KI-10 Yin Gu — its immediate neighbour at the same crease, and the He-Sea and Water point of the Kidney channel. The pairing is the most natural on the medial knee: Water point of the Wood channel beside Water point of the Water channel, used together to nourish Liver and Kidney yin, which the tradition treats as sharing a common source. Both are held here.
• With SP-06 San Yin Jiao — the meeting point of the three leg yin channels, and the standard partner for anything involving blood, yin, the lower abdomen or the genitals. This is probably the commonest combination the point appears in.
• With SP-09 Yin Ling Quan — the He-Sea and Water point of the Spleen channel, a few inches below on the same side of the leg, for the damp-heat presentations: discharge, genital itching, difficult urination. The two He-Sea Water points of the medial leg are used together precisely because damp is a Spleen problem and the lower burner is Liver territory.
• With LIV-05 Li Gou — the Luo-Connecting point of the Liver, whose own recorded territory is genital itching and swelling. LIV-05 and LIV-08 are the channel's two genital points and are commonly used as a pair.
• With LIV-03 Tai Chong — the Yuan-Source and Shu-Stream point. This is the contrast pairing rather than a reinforcement: LIV-03 moves and spreads, LIV-08 nourishes, and using both addresses a Liver that is simultaneously stuck and depleted, which is the commonest real presentation.
• With REN-03 Zhong Ji and REN-04 Guan Yuan — the lower abdominal points, added for urinary retention, uterine prolapse and menstrual disorders.
• Locally at the knee — with LIV-07 Xi Guan just below it, and with SP-09 and KI-10, for pain and stiffness of the inner knee. Both LIV-07 and the wider medial-knee group are held in this library.

Where does LIV-08 sit among its category peers?

All twelve He-Sea points are held in Sacred Lotus sources & references, and they divide cleanly by the yin/yang rule: on yin channels the He-Sea point is the Water point, on yang channels the Earth point.

• He-Sea & Water (yin channels) — LU-05 Chi Ze, SP-09 Yin Ling Quan, HT-03 Shao Hai, KI-10 Yin Gu, P-03 Qu Ze, LIV-08 Qu Quan
• He-Sea & Earth (yang channels) — LI-11 Qu Chi, ST-36 Zu San Li, SI-08 Xiao Hai, BL-40 Wei Zhong, SJ-10 Tian Jing, GB-34 Yang Ling Quan

The Liver's own five-shu set, all held here, is worth reading as a series, because it is the clearest illustration in the body of how the scheme distributes function along a single channel: LIV-01 Da Dun (Jing-Well, Wood), LIV-02 Xing Jian (Ying-Spring, Fire — the draining or child point, for Liver fire), LIV-03 Tai Chong (Shu-Stream, Earth, and also the Yuan-Source point), LIV-04 Zhong Feng (Jing-River, Metal) and LIV-08 Qu Quan (He-Sea, Water — the tonifying or mother point). LIV-02 and LIV-08 are the two ends of that logic: one drains an excess, the other supplements a deficiency, and choosing between them is the practical use of the whole scheme.

Source: Sacred Lotus sources & references (location, categories and cross-referenced point records — the twelve He-Sea points and the Liver five-shu set queried from our own holdings); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 485); Chinese Acupuncture & Moxibustion (pp. 223–224); cross-referenced against multiple online sources.

Where is LIV-08 located?

• A Manual of Acupuncture (p. 485): Just superior to the medial end of the popliteal crease, in the depression anterior to the tendons of m. semitendinosus and m. semimembranosus, about 1 cun anterior to Yingu KID-10.
• Chinese Acupuncture and Moxibustion (p. 223-224): When knee is flexed, the point is at the medial end of the transverse popliteal crease, posterior to the medial epicondyle of the tibia, in the depression of the anterior border of the insertions of m. semimembranosus and m. semitendinosus.

How is LIV-08 Qu Quan needled?

Reference fact: Sacred Lotus sources & references record perpendicular insertion of 0.5 to 0.8 inch at Qu Quan, with moxibustion applicable. Deadman & Al-Khafaji (p. 485) record a comparable perpendicular range of roughly 0.5 to 1 cun. These figures are set down as neutral reference data describing what the standard texts state. They are not instruction, and this page does not teach technique. Needling is carried out only by a qualified, licensed practitioner.

What lies beneath the point

• This is a low-hazard point, and it is worth saying so plainly rather than attaching a generic warning. LIV-08 lies on the medial side of the knee, over the medial condyle of the femur and the soft tissue in front of the hamstring tendons. There is no body cavity, no organ and no lung within reach, and the standard references attach no special prohibition to it. It carries none of the anatomical exposure of points over the thorax, the upper back or the root of the neck.
• The structures actually present are the tendons of semitendinosus and semimembranosus immediately behind, the saphenous nerve and the great saphenous vein running up the inner side of the leg, and the medial superior genicular vessels nearby. Bruising from a superficial vein and a sharp, radiating sensation from contact with a cutaneous nerve are the ordinarily documented occurrences; the reference literature treats these as normal considerations of technique rather than as hazards.
• The popliteal fossa is behind, not beneath. The large popliteal vessels and the tibial nerve lie in the middle of the back of the knee — the territory of BL-40 Wei Zhong, not of LIV-08, which sits at the medial end of the crease and in front of the tendons that mark its edge. The depth recorded by the texts is set by the soft tissue available, not by proximity to those vessels.
• Position matters for finding it. Both of our location records and the standard texts describe the point with the knee flexed, because the crease and the tendons that define it only appear when the knee bends. That is a locating convention rather than a needling instruction, but it is why descriptions of this point always begin with the knee.
• Moxibustion is recorded as applicable, and is consistent with a point whose principal recorded action is to supplement rather than to drain.

The general safety picture

For context rather than alarm: a meta-analysis of prospective clinical studies estimated serious adverse events from acupuncture at approximately 1 per 10,000 patients and around 8 per million treatments, with roughly half of all recorded events being bleeding, pain or flare at the needle site, and concluded that acupuncture is among the safer treatments in medicine (Bäumler P et al., BMJ Open 2021;11:e045961, PMID 34489268). The serious events recorded in that literature cluster at a small number of anatomically exposed points, and LIV-08 is not among them. Our sources record no pregnancy contraindication for LIV-08; within this library that caution attaches to points such as LI-04, SP-06, BL-60 and BL-67.

Source: Sacred Lotus sources & references (existing needling record); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 485); Chinese Acupuncture & Moxibustion (pp. 223–224); PMID 34489268 — checked as active with no retraction, erratum or expression of concern.

What does the name Qu Quan mean?

Qu Quan means "Spring at the Bend" — qu, to bend or crook, and quan, a spring of water. Both halves are literal. Qu is the knee, which has to be bent for the point to appear at all; the point is defined by the crease that bending makes. Quan is the water imagery of the five transporting points, and it is precise rather than decorative: this is the Water point of its channel, and the He-Sea point where the classics say the channel's qi finally enters the deep. So the name records both where the point is and what it is — a spring found in a fold.

The naming convention is worth noticing across the body. LI-11 Qu Chi, "Pool at the Bend", is the He-Sea point at the elbow crease and is held in this library under exactly that translation; P-03 Qu Ze, "Marsh at the Bend", is the He-Sea point at the inner elbow. Three He-Sea points at three creases, all named for a bend and a body of water. That is not coincidence: the classical namers were labelling the same idea each time.

Why is LIV-08 called the tonification point of the Liver?

The mother–child rule of the five phases states that to supplement a deficient channel one needles its mother point, and to drain an excessive channel one needles its child point. The Liver is Wood; Water generates Wood, so the Water point of the Liver channel is its mother point. On a yin channel the Water point is the He-Sea point. Therefore LIV-08 is the tonification point of the Liver, and LIV-02 Xing Jian, the Fire point, is its sedation point — Wood generates Fire, so Fire is the Liver's child. Both are held here, and holding the pair in mind is the practical use of the rule.

This is also why LIV-08 keeps company in the texts with blood and yin rather than with qi stagnation. The Liver is said to store the blood; a point that supplements the Liver is therefore a point that nourishes blood, and the indications follow — dry eyes, cramping sinews, scanty menstruation, brittle nails. Set beside LIV-03 Tai Chong, the difference is one of direction: LIV-03 moves what is stuck, LIV-08 replaces what is missing.

Is there research on LIV-08 Qu Quan?

LIV-08 has very little point-specific clinical research, and that is worth stating plainly rather than filling the gap with whole-protocol studies that happen to include it. What exists falls into two groups: one careful anatomical study that used the point to test whether two points on the same channel are physiologically distinct, and a handful of small trials and literature analyses in which LIV-08 appears as one member of a Liver-channel prescription.

• Point specificity, anatomical — the most directly relevant study. A Chinese Academy of Chinese Medical Sciences group compared the sensory and motor innervation of LIV-03 Tai Chong and LIV-08 Qu Quan in the rat, using regional dissection together with neural tract tracing with cholera toxin subunit B and dual fluorescent conjugates. Regional anatomy found branches of the deep peroneal nerve beneath LIV-03 and of the saphenous nerve beneath LIV-08. Dual tracing showed that the sensory and motor neurons associated with LIV-03 were separate from those associated with LIV-08, each projecting to its own spinal segments and target regions. The authors presented it as a worked example of differential innervation between two points on the same meridian (Xu D et al., Front Integr Neurosci 2021;15:728747, PMID 34539358, PMC8445157, DOI 10.3389/fnint.2021.728747). Animal anatomy rather than clinical evidence — but it is the one study in which LIV-08 is the object of investigation rather than an ingredient, and its finding is that the two most-used Liver points are neurologically distinct.
• Classical prescription analysis. A data-mining study of ancient acupuncture prescriptions for impotence, drawn from a large digitised corpus of Chinese medical texts, extracted 55 qualifying prescriptions using 24 points and found the five most frequently used to be KI-10 Yin Gu, LIV-08 Qu Quan, ST-30 Qi Chong, LIV-03 Tai Chong and KI-02 Ran Gu, with cluster analysis grouping KI-10 with LIV-08 (Tan ZG et al., Zhongguo Zhen Jiu 2021;41(6):685–9, PMID 34085490). This is textual research, not a trial; it does not show that anything works. What it does show is that the LIV-08 / KI-10 pairing described under practice above is genuinely the classical pattern and not a modern gloss.
• Liver-channel protocols in small trials. A randomised controlled trial in 62 women with diminished ovarian reserve compared electroacupuncture at LIV-03, LIV-05, LIV-08 and LIV-12 against oral hormone therapy over three menstrual cycles, reporting improvement in symptom, anxiety and depression scores and in ovarian measures in both arms, with no significant difference in overall effective rate between them (Luo Q et al., Zhongguo Zhen Jiu 2024;44(11):1261–6, PMID 39532442). A smaller study of 30 outpatients with depression used the five transporting points of the Liver channel with bloodletting at LIV-01, against fluoxetine, reporting comparable overall response with better global-impression scores at six and eight weeks (Xie HW et al., Zhen Ci Yan Jiu 2012;37(2):140–4, PMID 22764601). Small, and in both cases LIV-08 is one point among four or five, so nothing can be attributed to it individually. Readers who look up the second of these should note that its English abstract labels Ququan as "LR 5"; LR 5 is Li Gou, and the point named is LIV-08. The mislabelling is in the published abstract, not in our record.

The honest summary: no adequately powered trial isolates LIV-08 for any of its traditional indications. What the point has is an unusually coherent classical rationale — the arithmetic of the five phases makes its role predictable rather than asserted — a consistent documented use across the reference literature, and one good anatomical study suggesting it is physiologically distinguishable from its own channel's most famous point.

How does Qu Quan compare with the points around it?

KI-10 Yin Gu lies about a cun behind it between the same two tendons, and is the He-Sea and Water point of the Kidney channel; the two are the closest neighbours on the medial knee and are the pair most often confused, though their channels and therefore their reach differ. LIV-07 Xi Guan sits just below and in front, a more purely local knee point. SP-09 Yin Ling Quan is the He-Sea and Water point of the Spleen channel, lower on the inner leg below the knee, and is the damp-resolving member of the medial-leg group. LIV-03 Tai Chong, far down on the foot, is the Liver point most people reach for first — and the contrast with LIV-08 is the single most useful thing to carry away from this page: LIV-03 moves a Liver that is stuck, LIV-08 supplements a Liver that is empty, and the five-phase scheme tells you which is which before you ever palpate.

Source: Sacred Lotus sources & references (name, categories and cross-referenced point records); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 485); Chinese Acupuncture & Moxibustion (pp. 223–224); Nan Jing, on the five-shu points and the mother–child rule; PubMed PMID 34539358, 34085490, 39532442, 22764601 — each verified resolvable and checked for retraction, erratum and expression of concern, all clean; cross-referenced against multiple online sources.