REN-10 (Xia Wan) Lower Venter

What does REN-10 Xia Wan do?

Xia Wan REN-10 is the lowest of the three "Wan" points on the upper abdomen, and its recorded work is to move food onward — it harmonises the Stomach, regulates qi and disperses food that has stopped. Sacred Lotus sources & references classify it as a Meeting Point of the Conception Vessel with the Spleen Channel, and that single classification explains why a Conception Vessel point on the midline carries digestive actions at all: the Spleen, the organ the tradition holds responsible for transforming and transporting what is eaten, meets the midline here.

• Harmonises the Stomach and regulates qi — the core action. "Harmonising the Stomach" in this literature means restoring the downward direction of Stomach qi, and it is the recorded basis for REN-10's use in nausea, vomiting, hiccup and epigastric pain.
• Dispels food stagnation — the action that distinguishes REN-10 from its neighbours. Where REN-12 Zhong Wan is the general point for the Stomach as an organ, REN-10 is specifically the point for food that has been eaten and has not moved on: fullness after meals, undigested food in the stool, a hard sense in the lower part of the epigastrium.
• Strengthens the Spleen's transporting function — an extension of the meeting-point classification rather than a separate claim, and the reason REN-10 appears in prescriptions for chronic loose stool, borborygmus and poor absorption alongside its acute food-stagnation use.

The anatomical reading behind the three-Wan set is worth stating because it is what makes REN-10's specialisation intelligible. The classical texts map the three points onto the stomach itself: Shang Wan REN-13, the upper venter, onto the stomach's upper opening; Zhong Wan REN-12, the central venter, onto its body; and Xia Wan REN-10, the lower venter, onto its lower outlet, where the stomach empties into the intestine. A point over the outlet is the point for what will not leave — which is exactly the action recorded.

Source: Sacred Lotus sources & references (channel, meeting-point classification and existing action record); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 509); Chinese Acupuncture & Moxibustion (p. 238); cross-referenced against multiple online sources.

What is REN-10 Xia Wan used for?

Xia Wan REN-10 is used above all for indigestion and food retention — the sensation of food sitting undigested — together with epigastric and abdominal pain, vomiting and diarrhoea. The indications below are those carried in Sacred Lotus sources & references together with those set out in the standard reference literature. They describe traditional use, not proven treatment, and this point carries the safety facts set out under needling, including the recorded pregnancy caution.

• Indigestion and food retention
• Epigastric pain
• Abdominal pain and distension
• Vomiting and nausea
• Borborygmus — audible rumbling of the intestines
• Diarrhoea, including undigested food in the stool
• Poor appetite and fullness after eating
• Palpable hardness or accumulation in the abdomen
• Emaciation and weakness attributed to poor absorption
• Weakness of the Spleen and Stomach with chronic loose stool

Source: Sacred Lotus sources & references (existing indication and use records); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 509); Chinese Acupuncture & Moxibustion (p. 238).

Where is REN-10 Xia Wan, and how is it used in practice?

Xia Wan lies on the midline of the abdomen two cun above the navel — about two thumb-widths up from the umbilicus, a third of the way from the navel toward the lower tip of the breastbone. Deadman & Al-Khafaji fix the same position from the other end, as six cun below the angle where the ribs meet the sternum. It is the tenth point of the Conception Vessel and the lowest of the three points named for the wan, the stomach cavity.

Which points is REN-10 combined with?

• With Zhong Wan REN-12 — the point two cun above it and the anchor of the whole group: the Front-Mu point of the Stomach and the Hui-Meeting point of the fu organs. REN-10 is rarely used without it, and the pair is the standard treatment for food stagnation with epigastric fullness.
• With Shang Wan REN-13 — completing the three-Wan set, at five cun above the navel. All three are held in this library, and the classical texts use them together where the whole stomach is disturbed rather than one part of it.
• With Zu San Li ST-36 — the He-Sea point of the Stomach channel on the leg, and the standard distal partner for every abdominal digestive point.
• With Tian Shu ST-25 — the Front-Mu point of the Large Intestine at the level of the navel, added where the stagnation has passed into the intestines and the presentation includes diarrhoea or constipation.
• With Nei Guan P-06 — for nausea, vomiting and hiccup, where the Stomach qi is rebelling upward.
• With Pi Shu BL-20 and Wei Shu BL-21 — the Back-Shu points of the Spleen and Stomach, used with the abdominal points as a front-and-back treatment in chronic digestive weakness.
• Method — Sacred Lotus sources & references record moxibustion as applicable at this point, and moxa at the Wan points is a standard approach in patterns of cold and deficiency of the middle jiao.

What is the "Yin Qi Gui Yuan" group, and where does REN-10 fit?

REN-10's most distinctive modern role is as one of the four points of the abdominal-acupuncture core prescription usually rendered Yin Qi Gui Yuan — "leading the qi back to its origin" — comprising Zhong Wan REN-12, Xia Wan REN-10, Qi Hai REN-06 and Guan Yuan REN-04, all four held in this library. The group runs down the midline from the epigastrium to the lower abdomen and is used as a foundation set to which condition-specific points are added. It appears throughout the abdominal-acupuncture trial literature — for example as the base prescription in a randomised study of this needling method in primary insomnia (Zhen Ci Yan Jiu 2019;44(11):835–8, PMID 31777236) and in a randomised trial of abdominal acupuncture for diarrhoea-predominant irritable bowel syndrome (Zhongguo Zhen Jiu 2017;37(11):1147–1150, PMID 29354989). REN-10's presence in that group is the commonest way a reader will meet the point in modern practice, and it is worth knowing that in that context the point is being used as part of a fixed foundation set rather than for food stagnation as such.

Source: Sacred Lotus sources & references (location, meeting-point classification, and the Conception Vessel abdominal point records queried in full); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 509); Chinese Acupuncture & Moxibustion (p. 238); PMID 31777236; PMID 29354989; cross-referenced against multiple online sources.

Where is REN-10 located?

• A Manual of Acupuncture (p. 509): On the midline of the abdomen, 2 cun above the umbilicus and 6 cun below the sternocostal angle.
• Chinese Acupuncture and Moxibustion (p. 238): On the anterior midline, 2 cun above the umbilicus.

How is REN-10 Xia Wan needled, and what cautions are recorded?

Two things must be stated before anything else. First: Sacred Lotus sources & references carry an explicit caution that great care is required when needling the Conception Vessel points from Qu Gu REN-02 up to Shang Wan REN-13 in pregnant women — a range that includes REN-10. Second: REN-10 lies on the abdominal midline, and the abdominal wall is all that separates the needle from the viscera, which is why the depth recorded in the texts is a bounded range rather than an open one. Everything below is recorded as neutral reference data describing what the textbooks and the published anatomical studies state. It is not instruction, and this page does not teach technique. Needling is carried out only by a qualified, licensed practitioner.

The angle and depth the texts record

• Sacred Lotus sources & references record perpendicular insertion of 0.5 to 1.2 inches at REN-10, with moxibustion applicable — the same figure our records carry for its neighbours REN-11 Jian Li and REN-13 Shang Wan, which is what one would expect of three points on the same stretch of abdominal wall.
• Deadman & Al-Khafaji (p. 509) and Chinese Acupuncture & Moxibustion (p. 238) record a comparable bounded perpendicular range.
• Moxibustion is documented as applicable and is much used at this point.
• The standard abdominal cautions recorded across the reference literature apply to the whole group: the margin is narrower in thin patients and in children, where an organ is enlarged, and where a hollow organ is distended. The texts also record that the lower abdominal points are treated with the bladder empty, since a full bladder rises out of the pelvis; that particular caution belongs to the points below the navel rather than to REN-10.

The measured anatomy — and which point was actually measured

• What was measured: REN-12, two cun above REN-10. An observational ultrasound study recruited 85 healthy volunteers and obtained usable images in 83, measuring the "allowable needle insertion range" at Zhongwan CV-12. The mean allowable range was 25.3 ± 10.2 mm, generally greater in women than in men, and the liver was visible in the ultrasound image in 62.7 per cent of subjects; those in whom no liver was seen had a thicker allowable range and a higher body-mass index. The authors concluded that anthropometric factors predict the range but that individual differences are not negligible, and that anatomical structures and organ positions should be assessed rather than assumed (Chu H et al., Healthcare (Basel) 2022;10(9):1707, PMID 36141319, PMC9498562). These figures were measured at REN-12, not at REN-10, and none of them is attributed here to REN-10. They are cited because REN-10 sits on the same midline two cun lower, in the same abdominal wall, and the study is the best direct imaging evidence available for this region.
• No single agreed safe depth exists for any point. Two systematic reviews of the safe-depth literature — 33 studies in the first, 47 in the second, using magnetic resonance imaging, computed tomography, ultrasound and cadaveric dissection — concluded that depths measured for the same point differ greatly between subject groups and methods, and that "safe depth" has never been standardised (J Altern Complement Med 2011;17(3):199–206, PMID 21417806; Evid Based Complement Alternat Med 2013;2013:740508, PMID 23935678).

What is actually documented

Injury to the abdominal viscera. A 2026 emergency-medicine case report describes four perforations of the small intestine caused by abdominal acupuncture in a 71-year-old man who had a giant abdominal wall hernia and intestinal obstruction, confirmed at emergency laparotomy. The authors' conclusion is precise and worth carrying: in that specific combination of circumstances the normal anatomical safeguards are lost, and abdominal needling should be approached with extreme caution or regarded as contraindicated (Int J Emerg Med 2026;19(1):120, PMID 41840473, PMC13104277). A radiology case report separately describes acute haemoperitoneum from direct liver injury caused by acupuncture (J Radiol Case Rep 2023;17(8):15–20, PMID 37654899, PMC10435255). Two systematic reviews of the Chinese case-report literature place traumatic organ injury among the serious recorded events and attribute them chiefly to improper technique (PMID 22967282; PMID 21124716, PMC2995190). Against that, a meta-analysis of prospective clinical studies estimated serious adverse events at approximately 1 per 10,000 patients and about 8 per million treatments (BMJ Open 2021;11:e045961, PMID 34489268).

The pregnancy caution

What our own record says. Sacred Lotus sources & references carry, on this point, the caution that great care should be taken when puncturing the Conception Vessel points from Qu Gu REN-02 to Shang Wan REN-13 in pregnant women. That is a caution across a range of the channel, framed as care rather than as absolute prohibition, and the same wording is carried on the neighbouring Conception Vessel points held here. It is stated as safety reference because it is among the facts a reader most needs about points in this band. It is worth recording alongside it that the modern evidence for actual harm from the traditionally forbidden points is weak: a review of the scientific literature found no objective evidence of harm across 15 clinical trials (823 women, several thousand treatments at one or more forbidden points), a cohort of 5,885 pregnant women, and animal work, with rates of preterm birth, miscarriage and stillbirth comparable to untreated controls (Carr DJ, Acupunct Med 2015;33(5):413–9, PMID 26362792), and a later systematic narrative review of randomised trials reached a similar conclusion about reported adverse outcomes (Med Acupunct 2019;31(6):346–360, PMID 31871522). The honest position is that the traditional caution is long-standing and near-universal in the texts, while the controlled evidence has not confirmed the harm it anticipates — and that most practitioners continue to observe it.

Source: Sacred Lotus sources & references (existing needling record, including the REN-02 to REN-13 pregnancy caution); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 509); Chinese Acupuncture & Moxibustion (p. 238); PMID 36141319 (PMC9498562); PMID 21417806; PMID 23935678; PMID 41840473 (PMC13104277); PMID 37654899 (PMC10435255); PMID 22967282; PMID 21124716 (PMC2995190); PMID 34489268; PMID 26362792; PMID 31871522 — each verified resolvable and checked for retraction status before citation.

What does the name Xia Wan mean?

Xia Wan means "Lower Venter" — xia, lower, and wan, the cavity of the stomach. Wan is a specific anatomical word rather than a poetic one: it names the hollow of the stomach, and "venter" is the old English anatomical term used to render it. The name is therefore purely positional, and it only makes sense as one of a set of three. Sacred Lotus sources & references hold all three: Shang Wan REN-13, the Upper Venter, five cun above the navel; Zhong Wan REN-12, the Central Venter, four cun above; and Xia Wan REN-10, the Lower Venter, two cun above. Read together the three names divide the stomach into an upper, a middle and a lower part, and each point takes the indications of the part it lies over — which is why REN-10, over the lower outlet, is the food-stagnation point of the three.

Why does the meeting-point classification matter at REN-10?

Sacred Lotus sources & references classify REN-10 as a Meeting Point of the Conception Vessel with the Spleen Channel, and this is the point's only formal category — it carries no five-shu, yuan, luo, xi-cleft, back-shu or front-mu classification, and none is invented here. Meeting points are where two or more channels are held to converge, and choosing one lets a single needle reach beyond the channel it sits on. The consequence at REN-10 is direct: the Spleen is the organ the tradition makes responsible for transforming food and transporting its essence, so a Conception Vessel point at which the Spleen channel arrives is a natural place to treat food that has not been transformed. It is instructive to compare this with its neighbours. Zhong Wan REN-12 is a far more heavily classified point — the Front-Mu of the Stomach, the Hui-Meeting point of the fu organs, and a meeting point of the Conception Vessel with the Small Intestine, Sanjiao and Stomach channels — while Shang Wan REN-13 meets the Stomach and Small Intestine channels. Three adjacent points, three different sets of convergence, and three correspondingly different clinical weights.

Is there research on REN-10 Xia Wan?

This must be answered plainly: there is no research isolating REN-10, and no randomised controlled trial has tested this point on its own for any indication. Anything that suggests otherwise would be misreading a protocol study.

REN-10 appears frequently in the modern trial literature, but essentially always as one member of the fixed Yin Qi Gui Yuan foundation group described under practice — REN-12, REN-10, REN-06 and REN-04 together — in studies of abdominal acupuncture for conditions ranging from insomnia (PMID 31777236) to diarrhoea-predominant irritable bowel syndrome (PMID 29354989). A randomised trial of a combination of He-Sea and Front-Mu points for enteral-nutrition feeding intolerance in critically ill patients likewise uses the point within a set (Zhen Ci Yan Jiu 2024;49(2), PMID 38239140). In every case the result belongs to the protocol. Those studies are recorded here as documented clinical use of the group REN-10 belongs to, not as evidence about REN-10, and the site does not present them as the latter.

What is genuinely missing is any experimental work testing this point against a control location, of the kind that exists for a handful of better-studied points. Until it does, the honest description of REN-10 is that it is a well-documented traditional point with a clear classical rationale and no point-specific modern evidence.

How does REN-10 compare with the points around it?

Zhong Wan REN-12, two cun above, is the dominant point of the region and the one REN-10 is nearly always used with; where REN-12 treats the Stomach as an organ, REN-10 treats what is stuck in it. Jian Li REN-11 sits between them at three cun above the navel and is the least used of the four, weighted toward abdominal distension and oedema. Shang Wan REN-13, at five cun, completes the Wan set and shades toward the upper opening of the stomach — hiccup, regurgitation and rebellious qi. Shui Fen REN-09, one cun above the navel, is the "Water Divide" and belongs to fluid metabolism and oedema rather than to food. Shen Que REN-08 at the navel itself is treated by moxa only. And laterally, Tai Yi ST-23 lies two cun out from REN-10 on each side as its Stomach channel partner, in the same relationship that ST-21 Liang Men holds to REN-12.

Source: Deadman & Al-Khafaji, A Manual of Acupuncture (p. 509); Chinese Acupuncture & Moxibustion (p. 238); Sacred Lotus sources & references (name, meeting-point classification, and the full run of Conception Vessel and Stomach channel abdominal point records queried); PMID 31777236; PMID 29354989; PMID 38239140 — each verified resolvable and checked for retraction status before citation; cross-referenced against multiple online sources.