8.3 Du Mai (Governing Vessel) and Ren Mai (Conception Vessel) Points
Key Takeaways
Du Mai (Governing Vessel / Sea of Yang) coordinates all Yang channels, regulates spinal marrow, enters the brain, and features high-yield emergency and tonification points including Du 26 (first-line resuscitation for fainting and syncope), Du 20 (raising sinking Yang and calming Shen), Du 14 (crossing of all six Yang channels to clear extreme heat or tonify Yang), and Du 4 (Mingmen fire tonification).
Ren Mai (Conception Vessel / Sea of Yin) regulates conception, the uterus, essence, and all Yin viscera; critical anterior midline points include Ren 3 (Front-Mu of Bladder), Ren 4 (Front-Mu of Small Intestine / Yuan Qi gate), Ren 6 (Sea of Qi), Ren 12 (Front-Mu of Stomach / Hui of Fu), and Ren 17 (Front-Mu of Pericardium / Hui of Qi).
Needling Ren 8 (Shenque) is strictly forbidden under all circumstances due to profound infection and peritonitis risks; it is treated exclusively with indirect moxibustion (over salt or ginger) to rescue collapsed Yang, warm cold diarrhea, or treat rectal prolapse.
Safety mandates for the Extraordinary midline vessels include: mandatory pre-needling bladder voiding before puncturing Ren 3 and Ren 4; step-wise downward angulation behind the sternum at Ren 22 to protect the trachea and aortic arch; transverse/subcutaneous insertion at Ren 17 to prevent pericardial puncture via congenital sternal foramina; and strict depth limitations at Du 15 and Du 16 to avoid the spinal cord and medulla oblongata.
8.3 Du Mai (Governing Vessel) and Ren Mai (Conception Vessel) Points
Quick Answer: The Du Mai ("Governing Vessel") and Ren Mai ("Conception Vessel") represent the primary anterior and posterior midline conduits of the body, functioning respectively as the "Sea of Yang Channels" and "Sea of Yin Channels." Key points examined on the NCCAOM examination include: Du 1 (Changqiang, hemorrhoids and prolapse), Du 4 (Mingmen, tonifies Kidney Yang and Mingmen fire), Du 9 (Zhiyang, clears jaundice and unbinds the chest), Du 14 (Dazhui, meeting of all Yang channels, premier point for clearing high fever or tonifying Yang), Du 15 (Yamen) and Du 16 (Fengfu, both carrying strict spinal cord puncture risks), Du 20 (Baihui, vertex point to raise sinking Yang or calm Shen), Du 26 (Shuigou/Renzhong, premier emergency resuscitation point for shock, coma, and acute lumbar sprain), Ren 3 (Zhongji, Front-Mu of Bladder, requires an empty urinary bladder), Ren 4 (Guanyuan, Front-Mu of Small Intestine, premier point for Yuan Qi tonification), Ren 6 (Qihai, Sea of Qi), Ren 8 (Shenque, strictly forbidden to needle, moxibustion only for Yang collapse), Ren 12 (Zhongwan, Front-Mu of Stomach and Hui of Fu), Ren 17 (Danzhong, Front-Mu of Pericardium and Hui of Qi, subcutaneous insertion only), and Ren 22 (Tiantu, asthma and throat disorders, angled inferiorly behind the manubrium to avoid tracheal and aortic puncture).
Du Mai (Governing Vessel / Sea of Yang): Du 1 – Du 28
The Du Mai originates internally in the pelvic cavity, emerges superficially in the perineum at Du 1 (Changqiang), ascends along the posterior midline directly through the vertebral column, reaches the nape of the neck (Du 14 Dazhui, Du 15 Yamen, Du 16 Fengfu), enters the brain (Luo Nao), climbs to the vertex (Du 20 Baihui), descends the midline of the forehead and nose (Du 24 Shenting, Du 25 Suliao), and terminates inside the mouth at the labial frenulum of the upper gum (Du 28 Yinjiao).
As the Sea of Yang Channels (Yang Mai Zhi Hai), Du Mai governs the body's functional warmth, spinal structural stability, brain function, and psychic vitality (Shen).
Du Mai Point Master Reference
| Point | Pin Yin | Location | Category / Dynamic | Primary Actions & Indications | Needling Depth, Angle & Safety Cautions |
|---|---|---|---|---|---|
| Du 1 | Changqiang | Midway between tip of coccyx and anus | Luo-Connecting point; meeting point of Du, Ren, KI, and GB | Regulates intestines, raises Yang; hemorrhoids, rectal prolapse, anal fissure, coccydynia | 0.5–1.0 cun perpendicular or oblique superiorly. Avoid puncturing the rectum. |
| Du 3 | Yaoyangguan | Below spinous process of L4, level with highest points of iliac crests | Local point | Warms Lower Jiao, warms lumbar spine; chronic lumbago, impotence, lower extremity paresis | 0.5–1.0 cun perpendicular. Insert into interspinous ligament. |
| Du 4 | Mingmen | Below spinous process of L2, opposite the umbilicus | Local / Systemic point | Premier point to warm the Gate of Life (Mingmen Fire), tonify Kidney Yang, treat cold extremities, chronic diarrhea (Wu Geng Xie), fatigue | 0.5–1.0 cun perpendicular. Moxibustion is exceptionally effective and indicated. |
| Du 9 | Zhiyang | Below spinous process of T7, level with inferior angle of scapulae | Local / Systemic point | Premier point for jaundice, resolves Gallbladder/Liver Damp-Heat, unbinds chest oppression, gastric fullness | 0.5–1.0 cun oblique superiorly into interspinous space. Spinal canal depth caution. |
| Du 14 | Dazhui | Below spinous process of C7 (vertebra prominens) | Meeting point of all six Yang channels and Du Mai; Sea of Qi point | Premier point to clear high fever, release exterior pathogenic Heat, clear summer-heat; also tonifies Yang in chronic deficiency, malaria | 0.5–1.0 cun oblique superiorly. Can be bled with lancet and cupped (Ci Luo Ba Guan) for acute febrile crises. |
| Du 15 | Yamen | On posterior midline, 0.5 cun superior to posterior hairline, below spinous process of C1 | Meeting point of Du and Yangwei; Sea of Qi point | Treats aphasia, muteness, post-stroke speech impairment, stiff tongue, neck rigidity | 0.5–0.8 cun strictly perpendicular. SEVERE CONTRAINDICATION: Never needle deeply or angle superiorly; high risk of puncturing medulla oblongata and spinal cord. |
| Du 16 | Fengfu | On posterior midline, 1 cun superior to posterior hairline, in depression below external occipital protuberance | Sea of Marrow point; Window of Heaven point; Ghost point | Eliminates interior and exterior Wind; apoplexy, stroke, suicidal depression, stiff neck, dizziness | 0.5–0.8 cun strictly perpendicular. SEVERE CONTRAINDICATION: Never angle upward into foramen magnum; puncture risk to brainstem. |
| Du 20 | Baihui | On vertex on sagittal midline, 5 cun posterior to anterior hairline, 7 cun anterior to posterior hairline | Meeting point of Du, BL, GB, SJ, and LR channels; Sea of Marrow point | Raises sinking Yang Qi (rectal/uterine prolapse, gastroptosis), clears the mind, calms Shen, eliminates internal Liver Wind, treats stroke | 0.5–0.8 cun transverse / subcutaneous directed anteriorly (to raise Yang) or posteriorly (to descend Yang/calm Shen). |
| Du 24 | Shenting | On forehead, 0.5 cun superior to midpoint of anterior hairline | Meeting point of Du, BL, and ST channels | Calms the spirit (Shen), severe anxiety, insomnia, palpitations, rhinitis, frontal headache | 0.3–0.5 cun transverse / subcutaneous directed posteriorly. |
| Du 26 | Shuigou (Renzhong) | In upper 1/3 of philtrum, below the nasal septum | Meeting point of Du, LI, and ST channels; Ghost point | Premier emergency resuscitation point for coma, syncope, shock, heat exhaustion, acute mania; acute lumbar sprain | 0.3–0.5 cun oblique directed superiorly with strong pecking stimulation; or pinch with fingernail in acute emergency. |
Ren Mai (Conception Vessel / Sea of Yin): Ren 1 – Ren 24
The Ren Mai originates internally in the pelvic cavity (uterus in women), emerges superficially at the perineum at Ren 1 (Huiyin), ascends the anterior midline of the pubis (Ren 2 Qugu), traverses the lower abdomen (Ren 3 Zhongji, Ren 4 Guanyuan, Ren 6 Qihai), passes through the umbilicus (Ren 8 Shenque), ascends the epigastrium (Ren 12 Zhongwan), climbs the sternum (Ren 17 Danzhong), ascends the throat to the suprasternal fossa (Ren 22 Tiantu), and terminates in the mentolabial groove below the lower lip (Ren 24 Chengjiang).
As the Sea of Yin Channels (Yin Mai Zhi Hai), Ren Mai dominates all Yin functions, blood, body fluids, essence (Jing), reproduction, menstruation, conception, and gestation.
Ren Mai Point Master Reference
| Point | Pin Yin | Location | Category / Dynamic | Primary Actions & Indications | Needling Depth, Angle & Safety Cautions |
|---|---|---|---|---|---|
| Ren 1 | Huiyin | In perineum, midway between anus and posterior scrotum (males) or posterior labial commissure (females) | Meeting point of Ren, Du, and Chong Mai; Ghost point | Emergency resuscitation from drowning, asphyxia, coma, perineal pain, amenorrhea | 0.5–1.0 cun perpendicular. Patient in lithotomy or lateral recumbent position. |
| Ren 3 | Zhongji | On anterior midline, 4 cun inferior to umbilicus, 1 cun superior to pubic symphysis | Front-Mu of Urinary Bladder; meeting point of Ren, SP, LR, and KI | Premier point for urinary dysfunction (dysuria, enuresis, retention, cystitis), Lower Jiao Damp-Heat, dysmenorrhea | 0.5–1.0 cun perpendicular. MANDATORY SAFETY RULE: Patient must completely empty urinary bladder prior to needling to prevent bladder puncture. |
| Ren 4 | Guanyuan | On anterior midline, 3 cun inferior to umbilicus, 2 cun superior to pubic symphysis | Front-Mu of Small Intestine; meeting point of Ren, SP, LR, and KI | Premier point to tonify Yuan Qi, tonify Kidney Yang and Yin, nourish Blood, cold uterus, infertility, chronic fatigue | 0.8–1.2 cun perpendicular. MANDATORY SAFETY RULE: Patient must empty urinary bladder. Moxibustion highly effective. |
| Ren 6 | Qihai | On anterior midline, 1.5 cun inferior to umbilicus | Sea of Qi point | Premier point to tonify Qi, raises sunken Qi, relieves abdominal distension, enuresis, edema | 0.8–1.2 cun perpendicular. Moxa frequently applied. |
| Ren 8 | Shenque | In center of umbilicus | Local / Systemic point | Rescues collapsed Yang, warms cold diarrhea, rectal prolapse, abdominal pain | NEEDLING IS STRICTLY FORBIDDEN (CONTRAINDICATED). MOXIBUSTION ONLY (indirect moxa over salt, ginger, or aconite cake). |
| Ren 9 | Shuifen | On anterior midline, 1 cun superior to umbilicus | Local point | Regulates water passages, dispels edema, ascites, urinary retention, borborygmus | 0.5–1.0 cun perpendicular. Avoid deep peritoneal penetration in thin patients. |
| Ren 12 | Zhongwan | On anterior midline, 4 cun superior to umbilicus (midpoint between xiphoid and umbilicus) | Front-Mu of Stomach; Hui-Meeting point of Fu organs; meeting point of Ren, SI, SJ, and ST | Premier point to harmonize Spleen and Stomach, tonify Middle Jiao, gastric pain, vomiting, acid reflux, transform phlegm | 0.8–1.2 cun perpendicular. Deep puncture caution: can penetrate left lobe of liver or stomach wall if stomach is distended. |
| Ren 14 | Juque | On anterior midline, 6 cun superior to umbilicus, 2 cun inferior to sternocostal angle | Front-Mu of Heart | Calms Shen, clears Heart Fire, palpitations, chest pain, acid regurgitation, mania | 0.3–0.8 cun oblique directed inferiorly. Avoid deep perpendicular puncture (hepatomegaly / enlarged heart caution). |
| Ren 17 | Danzhong | On anterior midline, in 4th intercostal space, level with nipples in males | Front-Mu of Pericardium; Hui-Meeting point of Qi; Sea of Qi point | Premier point to unbind chest and move Qi: asthma, wheezing, dyspnea, palpitations, chest pain, promotes lactation | 0.3–0.5 cun transverse / subcutaneous directed superiorly or inferiorly. SEVERE CAUTION: Deep perpendicular insertion is strictly forbidden due to congenital sternal foramen. |
| Ren 22 | Tiantu | In center of suprasternal fossa, 0.5 cun superior to suprasternal notch | Meeting point of Ren and Yinwei; Window of Heaven point | Premier point for acute wheezing, asthma, bronchitis, severe cough, globus hystericus, aphonia | Two-step insertion: 0.2 cun perpendicular, then angle needle downward behind the manubrium of the sternum 0.5–1.0 cun. SEVERE CAUTION: Puncture risk of trachea or aortic arch. |
| Ren 24 | Chengjiang | In depression of mentolabial groove below lower lip | Meeting point of Ren, Du, LI, and ST; Ghost point | Facial paralysis, toothache, excess salivation, aphonia, deviation of mouth | 0.2–0.3 cun oblique superiorly. Avoid labial artery. |
Critical Midline Safety Directives
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| CRITICAL MIDLINE SAFETY & NEEDLING RULES |
+----------------------------------------------------------------------------+
| 1. REN 8 (SHENQUE): |
| - Needle Insertion: STRICTLY FORBIDDEN UNDER ALL CIRCUMSTANCES. |
| - Indicated Modality: Indirect Moxibustion ONLY (Salt, Ginger). |
| - Hazard: High infection risk, umbilical hernia, septic peritonitis. |
| |
| 2. REN 3 & REN 4 (LOWER ABDOMINAL FRONT-MU POINTS): |
| - Mandatory Protocol: Patient MUST EMPTY BLADDER PRIOR TO NEEDLING. |
| - Hazard: Puncturing a distended urinary bladder, causing extravasation |
| of urine into the peritoneal cavity and chemical/bacterial peritonitis.|
| |
| 3. REN 17 (DANZHONG) & THE STERNAL FORAMEN HAZARD: |
| - Needle Angle: Strictly TRANSVERSE / SUBCUTANEOUS (0.3–0.5 cun). |
| - Hazard: Congenital sternal foramen (present in ~5-8% of the general |
| population). Deep perpendicular insertion passes directly through the |
| sternum into the pericardial sac and right ventricle. |
| |
| 4. REN 22 (TIANTU) TWO-STEP TECHNIQUE: |
| - Step 1: Insert perpendicularly 0.2 cun through the skin. |
| - Step 2: Redirect needle tip DOWNWARD BEHIND POSTERIOR MANUBRIUM |
| into the anterior mediastinum (0.5–1.0 cun). |
| - Hazard: Direct perpendicular puncture penetrates the trachea; deep or |
| deviated insertion lacerates the brachiocephalic vein or aortic arch. |
| |
| 5. DU 15 (YAMEN) & DU 16 (FENGFU) ATLANTO-OCCIPITAL HAZARD: |
| - Needle Trajectory: Strictly PERPENDICULAR 0.5–0.8 cun only. |
| - Prohibited Action: Never angle upward toward the foramen magnum. |
| - Hazard: Punctures the cisterna magna, medulla oblongata, or spinal |
| cord, causing immediate fatal respiratory or vasomotor failure. |
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A patient with long-standing Spleen and Kidney Yang deficiency has chronic cold, watery diarrhea and dull abdominal pain relieved by warmth. The practitioner plans to treat Shenque (Ren 8). What is the rule for this point?
Insert a 30-gauge needle perpendicularly 1.5 cun with reinforcing manipulation
Bleed the point with a three-edged lancet, then apply flash cupping
Insert a needle transversely, directed superiorly, to raise sinking Yang
Do not needle it; apply indirect moxibustion over a layer of salt
An acupuncturist is preparing to needle Tiantu (Ren 22) for a patient experiencing an acute asthmatic bronchospasm with throat tightness. Which step-by-step insertion technique and anatomical knowledge must be applied to perform this procedure safely?
Insert the needle perpendicularly 1.5 cun directly into the tracheal lumen to stimulate bronchial dilation
Puncture obliquely superiorly at a 45-degree angle toward the thyroid cartilage to a depth of 1.2 cun
Insert 0.2 cun perpendicularly, then direct the needle downward behind the manubrium about 0.5-1.0 cun
Puncture transversely across the suprasternal fossa from left to right to avoid all deep cervical vessels
When treating a patient for post-stroke aphasia and spastic neck rigidity at Yamen (Du 15) and Fengfu (Du 16), which severe anatomical risk dictates the strict limitation of needle depth and angle?
Laceration of the carotid artery causing an immediate ischemic stroke
Puncture of the apex of the lung resulting in a tension pneumothorax on the needled side
Needle entry through the foramen magnum, injuring the medulla oblongata or spinal cord
Severing the accessory nerve causing paralysis of the trapezius muscle on both sides
Before inserting needles into Zhongji (Ren 3) and Guanyuan (Ren 4) on the lower abdomen, what mandatory clinical action must the practitioner confirm to prevent internal organ injury?
Confirm that the patient has completely emptied their urinary bladder immediately prior to treatment
Ensure the patient has fasted for at least 12 hours to prevent colon perforation
Palpate the femoral pulse to verify adequate lower extremity arterial perfusion
Administer oral fluids to ensure the bladder is distended for accurate anatomical localization
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