DU-15 (Ya Men) Mute's Gate

What does DU-15 Ya Men do?

Ya Men DU-15 is the tongue-and-speech point of the Governing Vessel: its defining recorded action is to benefit the tongue and treat muteness, and its name — "Mute's Gate" — says so directly. Sacred Lotus sources & references record that action first, ahead of everything else, and classify the point both as a Point of the Sea of Qi and as a Meeting Point of the Governing Vessel and the Yang Linking (Yang Wei) vessel. Very few points in the repertoire are named for a single clinical problem; this is one, and the name is the shortest possible summary of what the tradition asks of it.

• Benefits the tongue and treats muteness — the primary recorded action and the reason the point exists in classical practice. It is the point reached for when speech is lost or the tongue will not move: sudden loss of voice, a stiff or rigid tongue, and the speech loss that follows windstroke. The whole of the point's identity is built on this one function.
• Eliminates wind — the second recorded action. DU-15 sits in the nape, the region the classics treat as the doorway through which external wind enters the body, and it shares that territory with Feng Fu DU-16 ("Wind Mansion") immediately above it and Feng Chi GB-20 ("Wind Pool") to either side. All three are named or used for wind, and the naming is not a coincidence: this small area of the neck is the classical wind gate.
• Benefits the neck and the spine — the local action, for rigidity and pain of the nape and for the inability to turn or bend the head. Because the Governing Vessel runs the length of the spine, a point at its cervical end is also used for the spine as a whole.
• Calms the spirit and settles the interior — the classical reasoning behind its recorded use in mental-emotional disturbance and in epilepsy. The Governing Vessel's cranial points, DU-15 among them, carry these indications by virtue of the vessel's path into the brain rather than through any organ association.

Why do its two categories matter?

Point of the Sea of Qi. The Ling Shu describes four "seas" in the body, and locates the Sea of Qi in the chest, with its points above and below. Sacred Lotus sources & references hold exactly three points carrying that designation — Ya Men DU-15, Da Zhui DU-14 and Shan Zhong REN-17 — with the related Sea of Marrow points being Feng Fu DU-16 and Bai Hui DU-20, and the Sea of Blood point Da Zhu BL-11. The Sea-of-Qi grouping is why a point in the nape is classically associated with the qi of the whole trunk and with breathlessness, not only with the head.

Meeting Point with the Yang Linking Vessel. The Yang Wei vessel links the yang channels of the body together and is associated in the classics with the exterior — which is the theoretical basis for DU-15's wind indications. It shares this meeting-point status with Feng Fu DU-16 directly above, and the two points are constantly treated as a pair for that reason.

Source: Sacred Lotus sources & references (existing action record; both point categories, and the Sea-of-Qi, Sea-of-Marrow and Sea-of-Blood point sets, queried directly); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 546); Chinese Acupuncture & Moxibustion (p. 231); Ling Shu, on the four seas; cross-referenced against multiple online sources.

What is DU-15 Ya Men used for?

Ya Men DU-15 is used above all for loss of speech — muteness, sudden hoarseness, a stiff tongue and the aphasia that follows windstroke. The indications carried in Sacred Lotus sources & references are listed below alongside those set out in the standard reference literature. They describe traditional use, not proven treatment, and this point carries the most serious depth-and-angle cautions on the site, set out in full under needling.

• Muteness and loss of speech
• Sudden hoarseness or loss of the voice
• Stiffness and rigidity of the tongue
• Aphasia following windstroke
• Deafness accompanying muteness
• Windstroke (apoplexy) and its after-effects
• Epilepsy
• Mental-emotional disturbance and agitation
• Occipital headache
• Rigidity and pain of the neck and nape
• Inability to turn or bend the head
• Nosebleed
• Heavy sweating that does not stop

Source: Sacred Lotus sources & references (existing indication record); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 546); Chinese Acupuncture & Moxibustion (p. 231).

Where is DU-15 Ya Men, and how is it used in practice?

Ya Men lies exactly on the midline at the back of the neck, in the hollow half a cun above the middle of the posterior hairline and half a cun below Feng Fu DU-16 — that is, below the spinous process of the first cervical vertebra, which cannot be felt through the skin. Sacred Lotus sources & references give it in both those terms. Two features of that description matter more than any other. The point is on the midline, so there is no bone directly beneath it as there is over a vertebral body — the gap between the skull and the first cervical vertebra lies under it. And the landmark it is measured from, the first cervical spinous process, is described in the reference literature as impalpable, so the point is located by measurement from the hairline and from DU-16 rather than by feeling the bone. Both facts belong to the safety picture, and they are the reason this point is taught with more care than almost any other.

In practice DU-15 is used narrowly and deliberately. It is not a general-purpose point: it appears in speech and tongue disorders, in the after-effects of windstroke, and in a small number of nape complaints, and it is one of the points that modern point-selection analyses consistently rank among the most-used for aphasia and dysarthria. It is not a point used casually or for its own sake.

Which points is DU-15 combined with?

• With Lian Quan REN-23 — the point at the front of the throat above the larynx, on the Conception Vessel. Front-and-back pairing across the neck is the standard structure for speech and tongue disorders, and this is its clearest instance.
• With the extra point Jin Jin Yu Ye — "Golden Liquid, Jade Fluid", the paired points beneath the tongue, held in this library. In the modern literature on aphasia these under-tongue points and DU-15 recur together more often than almost any other combination.
• With Bai Hui DU-20 and Shui Gou DU-26 — the vertex and philtrum points of the same vessel, for windstroke, collapse and disturbed consciousness. These four Governing Vessel points form the backbone of the classical windstroke prescriptions.
• With Feng Fu DU-16 — half a cun directly above it on the same midline, its closest neighbour and its closest functional relative; the two share the Yang Linking meeting-point status and are used together for wind and for the nape.
• With Feng Chi GB-20 — to either side below the occiput, completing the classical nape group for wind, occipital headache and neck rigidity.
• With He Gu LI-04 — the distal partner reached for in almost any disorder of the head and face, and one of the four Command Points.

Where does DU-15 sit among the points of the nape?

Sacred Lotus sources & references hold four points in this small area and it is worth seeing them together, because they are constantly confused and their safety profiles differ. Ya Men DU-15 is on the midline, half a cun above the hairline. Feng Fu DU-16 is on the same midline, one cun above the hairline, directly in the hollow below the external occipital protuberance. Tian Zhu BL-10 is 1.3 cun to either side of DU-15, on the outer edge of the trapezius. Feng Chi GB-20 is further out again, in the hollow between the origins of sternocleidomastoid and trapezius below the occiput. Of the four, the two midline points — DU-15 and DU-16 — are the ones that lie over the foramen magnum, and they are the two that carry the strictest recorded limits on angle and depth. Above them on the Bladder channel sits Yu Zhen BL-09 on the occiput; below DU-15 on the Governing Vessel, Da Zhui DU-14 at the base of the neck.

Source: Sacred Lotus sources & references (location, categories and neighbouring point records queried directly); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 546); Chinese Acupuncture & Moxibustion (p. 231); PMID 30942044; PMID 37068826; cross-referenced against multiple online sources.

Where is DU-15 located?

• A Manual of Acupuncture (p. 546): On the midline at the nape of the neck, in the depression 0.5 cun inferior to Fengfu DU-16, below the spinous process of the first cervical vertebra (impalpable).
• Chinese Acupuncture and Moxibustion (p. 231): 0.5 cun directly above the midpoint of the posterior hairline, in the depression below the spinous process of the first cervical vertebra.

How is DU-15 Ya Men needled, and what is the risk?

Stated as plainly as it can be stated: DU-15 sits on the midline of the nape directly over the foramen magnum, the opening at the base of the skull through which the brainstem becomes the spinal cord. The medulla oblongata — which controls breathing and heart rate — lies behind that opening. Every standard reference records both a bounded shallow depth and, unusually, an explicit prohibition on the direction of insertion: the needle is recorded as directed downward toward the mandible, and never upward. Everything below is neutral reference data describing what the textbooks and the published imaging literature state. It is not instruction, and this page does not teach technique. Needling is carried out only by a qualified, licensed practitioner. Of every point held on this site, this is the one where the recorded limits exist for the most serious reason.

The angle and depth the texts record

• Sacred Lotus sources & references record perpendicular insertion of 0.5 to 0.8 inch, and attach the caution in the plainest possible language: neither upward-oblique nor deep insertion is advisable, because the medullary bulb lies in the deep layer, and the depth and angle must be given strict attention. "Medullary bulb" is an older term for the medulla oblongata. That sentence is the whole of the safety case in one line, and it is carried in our own record rather than added here.
• Deadman & Al-Khafaji (p. 546) and Chinese Acupuncture & Moxibustion (p. 231) record a comparable shallow range and both specify the direction of insertion toward the mandible — that is, downward and forward toward the lower jaw — with an explicit warning against directing the needle superiorly. The angle, not the depth alone, is the safety-critical variable here, exactly as it is at Feng Chi GB-20 next door.
• The reason the two are recorded together is geometric. A needle angled toward the jaw travels forward into the tissues of the neck. A needle angled upward at the same point travels toward the foramen magnum and what lies behind it. The same insertion depth is therefore not the same thing at the two angles.
• Moxibustion is generally recorded as inadvisable at this point in the reference literature, on the grounds of the hair and the underlying structures — which sets DU-15 apart from most Governing Vessel points, where moxibustion is standard.

The measured anatomy — safe depth at this exact point

Unusually for an acupuncture point, DU-15 has been measured directly by magnetic resonance imaging, twice, in two countries, and both studies exist because of what lies beneath it. These are among the very few point-specific safe-depth measurements in the whole literature.

• MRI measurement in 384 people, comparing normal and abnormal anatomy. Investigators measured the safety depth of perpendicular and oblique insertion at Yamen GV15 on sagittal cervical MRI in 177 patients with atlantoaxial dislocation and 207 people with normal anatomy, all of moderate build. In the normal group the safe depth for perpendicular insertion was 47.72 ± 5.06 mm in men and 44.63 ± 5.85 mm in women, and for oblique insertion 42.69 ± 5.53 mm and 39.88 ± 6.18 mm respectively. In the dislocation group the figures changed materially and the relationship between the two angles reversed: oblique became the deeper of the two rather than the shallower. The authors' conclusion was that the safe depth at this point changes significantly where the upper cervical anatomy is abnormal, and that insertion must remain within it (Zhou J et al., Zhongguo Zhen Jiu 2019;39(6):619–22, PMID 31190499, DOI 10.13703/j.0255-2930.2019.06.014).
• MRI measurement of what governs that depth. A Korean study measured, on sagittal brain MRI, the "dangerous depth" at GV15 — the horizontal distance from the skin surface at the point to the spinal dura mater — and analysed by multiple regression which body measurements predicted it. Safe depth was significantly associated with sex, with body mass index, and with the distance from the glabella to the occipital protuberance, the three together explaining most of the variation (R² = 0.571). The paper opens by stating the reason for the work: Yamen is anatomically close to the medulla oblongata, so establishing its safe depth is very important, and few studies had done so (Park SJ et al., J Pharmacopuncture 2014;17(1):70–3, PMID 25780692, PMC4331983, DOI 10.3831/KPI.2014.17.009).
• The neighbouring midline point has been measured too. A CT study of 41 adults divided by body type measured the safe perpendicular depth at Feng Fu DU-16, half a cun above DU-15, at 27.73 ± 3.45 mm in the thin group, 30.78 ± 2.90 mm in the moderate group and 33.39 ± 4.27 mm in the heavier group, defining safe depth as no more than 75 per cent of the dangerous depth (Yang SD et al., Zhongguo Zhen Jiu 2008;28(1):47–8, PMID 18257190). That the figures at DU-16 are markedly shallower than at DU-15 is the point worth taking from it: two points half a cun apart on the same midline do not share a depth.
• What all three say together. Safe depth at this point is not a constant. It varies with sex, with body size, with the angle chosen, and — decisively — with whether the upper cervical spine is normal. A textbook figure describes an average; it does not describe a person.

What is documented when the limits are exceeded

Injury to the brainstem and upper cervical cord from acupuncture needles is documented in the neurosurgical literature, and it is the reason this region is treated differently from the rest of the body.

• A retrospective review collected 26 patients with cervical or brain injuries caused by acupuncture needles, including the authors' own case of a broken needle embedded in the medulla oblongata and cerebellum which migrated further into the brain over a few days. Embedded needles were the commonest cause (57.7 per cent) and broken needles the next (42.3 per cent); 88.5 per cent of patients had sensory deficits and 42.3 per cent motor weakness; 61.5 per cent developed symptoms more than thirty days after the event. Surgical removal was performed in 80.8 per cent, and no conservatively managed patient improved (Miyamoto S et al., World Neurosurg 2010;73(6):735–41, PMID 20934166, DOI 10.1016/j.wneu.2010.03.020).
• A separate report in the neurological literature is titled, without qualification, Medulla oblongata injury caused by an acupuncture needle; warning for serious complications due to a common method of alternative medicine (Fukaya S et al., J Neurol 2011;258(11):2093–4, PMID 21544563, DOI 10.1007/s00415-011-6072-3).
• Two cases of cervical spinal cord injury from direct needle penetration, both presenting within two hours of acupuncture around the neck with arm weakness and paraesthesia and both confirmed on MRI, were reported from a regional trauma centre; neither patient made a complete recovery (Kim MS, Korean J Neurotrauma 2025;21(4):323–8, PMID 41220883, DOI 10.13004/kjnt.2025.21.e27).
• Acute cervical subdural haematoma as a complication of acupuncture is likewise on record (World Neurosurg 2016, PMID 27591101), as is subarachnoid haemorrhage with spinal root injury from a needle (Neurol Med Chir 1990, PMID 1710325).
• The two large systematic reviews of the Chinese-language adverse-event literature both place traumatic central-nervous-system injury among the small number of genuinely serious events on record. One reviewed 115 articles reporting 479 adverse events including 14 deaths (Zhang J et al., Bull World Health Organ 2010;88(12):915–921C, PMID 21124716, PMC2995190); the companion review of 1956–2010 identified 1,038 cases across 167 articles with 35 deaths (He W et al., J Altern Complement Med 2012;18(10):892–901, PMID 22967282). Both attribute the events chiefly to improper technique and conclude that they were largely avoidable.

Honest limit of what we can source: we could not locate a published case report naming Ya Men DU-15 itself as the point at which a fatal or disabling injury occurred. What is recorded above is what is documented — a bounded depth and an explicitly prohibited direction in every standard text, two MRI studies that measured the safe depth at this exact point and found it variable, and a neurosurgical literature of brainstem and upper-cervical-cord injuries from needles in this region. That is enough, and it is stated without adding to it.

The risk in proportion

These events are rare, and saying so is part of stating them accurately. 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 about half of all recorded events being bleeding, pain or flare at the needle site, placing acupuncture among the safer treatments in medicine (Bäumler P et al., BMJ Open 2021;11:e045961, PMID 34489268, DOI 10.1136/bmjopen-2020-045961). Both things are true at once. The overall rate is very low, and the serious events that do occur concentrate at a handful of anatomically exposed points — of which DU-15 and DU-16, over the foramen magnum, are the two most exposed on the body. The recorded angle and depth exist to keep that number where it is.

Source: Sacred Lotus sources & references (existing needling record, including its explicit caution against upward-oblique and deep insertion); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 546); Chinese Acupuncture & Moxibustion (p. 231); PMID 31190499; PMID 25780692 (PMC4331983); PMID 18257190; PMID 20934166; PMID 21544563; PMID 41220883; PMID 27591101; PMID 1710325; PMID 21124716 (PMC2995190); PMID 22967282; PMID 34489268 — each verified resolvable and checked for retraction status before citation.

What does the name Ya Men mean?

Ya Men means "Mute's Gate" — ya, mute or dumb, unable to speak, and men, a gate or door. It is one of the very few point names in the entire repertoire that names a specific clinical problem rather than a location, an image or a function, and Sacred Lotus sources & references translate it exactly that way. The name is doing two jobs. It records what the point is for — the loss of speech — and it marks the place as a threshold: a gate is something a thing passes through, and the tradition treats this hollow at the base of the skull as a doorway into the interior. The point is also recorded in the classical literature under the alternative names She Yan, "Tongue's Swelling", and Yin Men, "Mute's Gate" written with a different first character — both preserving the same association with the tongue and with speech.

Why is DU-15 the classical point for speech loss?

The reasoning in the classics runs through the Governing Vessel's path rather than through any organ. The Du Mai ascends the spine, enters the brain at the nape and continues over the vertex; DU-15 is the point at which it passes the skull base. The tongue, in classical theory, is governed by the Heart and reached by several channels, but the capacity to speak is placed with the brain and the spirit — and the Governing Vessel is the route to both. That is why loss of speech is treated at a point on the back of the neck rather than in the mouth, and why DU-15 is combined with Lian Quan REN-23 at the front of the throat: one point on each side of the neck, one on each of the two great midline vessels.

The classical record is unusually consistent about this point. It is one of the small number of points whose name, whose primary indication and whose combinations have not drifted in two thousand years.

Is there research on DU-15 Ya Men?

The most solid research on this point is anatomical rather than clinical — the two MRI safe-depth studies described under needling are directly about DU-15 and report measured figures. The clinical literature that names Ya Men almost always uses it inside a multi-point protocol, which measures the protocol and not the point. That distinction is kept here rather than blurred.

• Safety anatomy — the strongest point-specific work. The 384-subject MRI study of safe depth at Yamen GV15 in normal and atlantoaxially dislocated anatomy (PMID 31190499) and the regression study of the factors that determine that depth (PMID 25780692, PMC4331983). For DU-15, as for several anatomically exposed points, the safety literature is the substantial research literature.
• Point-selection analyses — where DU-15 actually ranks. Two independent data-mining studies of what practitioners in fact select for speech disorders both place Ya Men in the top handful. A data-mining analysis of 140 articles containing 146 prescriptions and 189 distinct points found Yamen GV15 among the five most frequently used points for aphasia, alongside Lian Quan CV23, Jin Jin EX-HN12, Yu Ye EX-HN13 and Bai Hui GV20, with the Governing Vessel the most-represented channel (Xu L et al., Zhongguo Zhen Jiu 2023;43(4):471–8, PMID 37068826). A systematic review and meta-analysis of 21 randomised trials in 1,651 patients with dysarthria likewise listed Yamen GV15 among the points used more than five times across the included trials, and reported a pooled odds ratio of 6.36 (95% CI 4.55 to 8.88) for acupuncture combined with speech training over control — while concluding that large, high-quality trials are still needed (Chen MY et al., Zhongguo Zhen Jiu 2019;39(2):215–21, PMID 30942044). These establish that the point's classical reputation is matched by its modern use; they do not establish that the point itself is what worked.
• A trial of the point on its own — with a caveat that must be stated. A randomised trial compared blood-pricking at Yamen GV15 combined with language rehabilitation, blood-pricking alone, and rehabilitation alone in pure motor aphasia after cerebral infarction, reporting total effective rates of 90.6, 84.4 and 75.0 per cent respectively, with the blood-pricking arm superior to rehabilitation alone (Ji X, Li HB, Zhongguo Zhen Jiu 2011;31(11):979–82, PMID 22136019). This is one of the very few studies to isolate the point. It is included with an explicit reservation: the published abstract states 96 cases randomised into three groups with "30 cases in each", then reports results over denominators of 32, an internal inconsistency we cannot resolve from the record. It is presented here as what it is — a small, single-centre, unblinded report with a numerical discrepancy on its face — and not as evidence of effect.
• Animal mechanism work. Acupuncture at Yamen GV15 with Fengfu GV16, Baihui GV20, Shuigou GV26 and Hegu LI4 reduced brain microglial activation in a rat traumatic brain injury model (J Tradit Chin Med 2020;40(2):267–74, PMID 32242392). It is a five-point animal protocol and is noted for completeness, not as evidence about this point in people.

What is missing should be said plainly: there is no adequately powered, well-controlled randomised trial isolating DU-15 as the tested variable for aphasia, dysarthria or any other of its indications. Trials of acupuncture for post-stroke speech disorders that include Ya Men among their points are studies of a protocol, and this site does not present them as though they were about this point.

How does DU-15 compare with Feng Fu DU-16 and the other nape points?

Feng Fu DU-16 lies half a cun directly above DU-15 on the same midline, in the hollow below the external occipital protuberance, and is the point DU-15 is most often confused with. The two share a great deal — both are on the Governing Vessel, both are Meeting Points with the Yang Linking vessel, both sit over the foramen magnum, both carry the strictest recorded limits on angle and depth in the repertoire. They differ in emphasis: DU-16 is the "Wind Mansion", weighted toward wind, headache and the head, and is classified in our own records as a Point of the Sea of Marrow, a Window of Heaven point and a Sun Si-miao Ghost Point; DU-15 is the "Mute's Gate", weighted toward the tongue and speech, and is a Point of the Sea of Qi. Tian Zhu BL-10 lies 1.3 cun to either side of DU-15 — our own location record for BL-10 is measured from this point — and is the local nape point of the Bladder channel, off the midline and therefore over muscle and bone rather than over the foramen magnum. Feng Chi GB-20 is further lateral and is the great wind point of the region. Da Zhui DU-14 is the next Governing Vessel point below, at the base of the neck. Among these, DU-15 is the narrowest in application and the most exacting in the limits recorded for it.

Source: Sacred Lotus sources & references (name, translation, categories and the neighbouring nape point records queried directly); Deadman & Al-Khafaji, A Manual of Acupuncture (p. 546); Chinese Acupuncture & Moxibustion (p. 231); PMID 31190499; PMID 25780692 (PMC4331983); PMID 37068826; PMID 30942044; PMID 22136019; PMID 32242392 — each verified resolvable and checked for retraction status before citation; cross-referenced against multiple online sources.