7.3 Shaoyin Channels: Heart (HT) and Kidney (KI) Points
Key Takeaways
Hand Shaoyin Heart (9 points) and Foot Shaoyin Kidney (27 points) form the Shaoyin axis—the fundamental physiological union of Fire and Water (Heart Fire and Kidney Water), governing consciousness, Shen, constitutional Jing, reproductive essence, and cardiovascular equilibrium.
Heart Channel points progress from the axilla (HT 1) to the radial little fingertip (HT 9), distinguished by HT 5 (Luo-Connecting, sudden aphasia/voice loss, arrhythmia), HT 6 (Xi-Cleft, acute heart pain, severe night sweats), and HT 7 (Shenmen - Yuan-Source/Shu-Stream, premier Shen-calming and Heart Blood/Yin tonification point).
Kidney Channel points ascend from the sole of the foot (KI 1 Yongquan - grounding floating Yang and reviving consciousness) up the medial leg and abdomen to the chest at KI 27 (Shufu), featuring KI 3 (Taixi - Yuan-Source, premier Kidney Yin/Yang tonifier), KI 6 (Zhaohai - Confluent of Yin Qiao, dry throat, Yin deficiency insomnia), and KI 7 (Fuliu - Jing-River, edema and sweat regulation).
Precise anatomical hazards must be rigorously enforced: axillary neurovascular bundles at HT 1; ulnar nerve/artery adjacent to HT 7, HT 6, HT 5; and chest points KI 21–KI 27 (2 cun lateral to midline), which present acute pneumothorax risks and, on the left side (KI 22–KI 25), lethal risk of cardiac puncture.
7.3 Shaoyin Channels: Heart (HT) and Kidney (KI) Points
Quick Answer: The Shaoyin pair represents the deepest anatomical and energetic axis of the body: the Water-Fire Axis (Shui Huo Ji Ji). Foot Shaoyin Kidney (Water / Yin) provides the primordial essence (Yuan Jing) and root of life, while Hand Shaoyin Heart (Fire / Yang) houses the Spirit (Shen) and commands blood circulation. Normal health requires continuous communication between them: Heart Fire must descend to warm Kidney Water, and Kidney Water must ascend to moisten and anchor Heart Fire. Essential Heart points include HT 1 (axillary artery hazard), HT 3 (He-Sea Water, clears Phlegm-Fire), HT 5 (Luo-Connecting, post-stroke aphasia, arrhythmia), HT 6 (Xi-Cleft, acute angina, severe night sweats), and HT 7 (Shenmen - Yuan-Source, premier Shen-calmer). Essential Kidney points include KI 1 (Jing-Well, grounds floating Yang, emergency hypertension), KI 2 (Ying-Spring, clears empty heat), KI 3 (Yuan-Source, supreme Kidney Yin/Yang tonifier), KI 6 (Master of Yin Qiao, dry throat, Yin-deficiency insomnia), KI 7 (Jing-River, Mother point, edema and sweating regulator), KI 9 (Xi-Cleft of Yin Wei, mental detox), and KI 10 (He-Sea Water, pelvic damp-heat). Crucial safety rules dictate extreme vigilance for the ulnar nerve/artery along the medial wrist, and absolute avoidance of deep perpendicular needling on the chest (KI 21–27) due to high pneumothorax and myocardial puncture risks.
The Shaoyin Axis: Water-Fire Harmony (Kan and Li)
In classical I-Ching cosmology, Shaoyin corresponds to the trigrams Kan (Water) and Li (Fire):
- Heart (Hand Shaoyin): Sovereign ruler (Jun Zhu Zhi Guan). Rules the Blood and Blood vessels, manifests in the face, opens into the tongue, and houses the Shen (Consciousness, Sleep, Memory, Emotional Stability).
- Kidney (Foot Shaoyin): Root of Pre-Heaven Qi (Xian Tian Zhi Ben). Stores Jing (Essence), rules water metabolism, controls bones and marrow, manifests in the head hair, opens into the ears and two lower orifices, and anchors respiration.
- Heart-Kidney Disharmony (Xin Shen Bu Jiao): When Kidney Yin is deficient, it fails to ascend to cool Heart Fire. Hyperactive Heart Fire blazes upward, causing severe insomnia, vivid dream-disturbed sleep, heart palpitations, panic, night sweats, sore throat, five-palm heat, and a red peeled tongue tip. Treatment mandates nourishing Kidney Water (KI 3, KI 6) while clearing Heart Fire and calming Shen (HT 7, HT 5).
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| THE SHAOYIN WATER-FIRE THERMODYNAMIC AXIS |
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| HEART (Fire / Li Trigram / Upper Jiao / Shen) |
| | |
| Heart Fire Descends | Kidney Water Ascends |
| to warm Kidney Water | to cool Heart Fire |
| v |
| KIDNEY (Water / Kan Trigram / Lower Jiao / Jing) |
| |
| * Pathology of Disconnection: Insomnia, palpitations, tidal fever, night |
| sweating, severe anxiety, lower back soreness, red tongue with red tip. |
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Heart Channel of Hand Shaoyin (HT 1 to HT 9)
The Hand Shaoyin Heart channel originates deep within the Heart organ, penetrates the cardiac vessels, descends through the diaphragm to communicate with the Small Intestine. A second internal ascending branch climbs along the esophagus to connect directly with the eye system (Mu Xi—the tissues and optic vessels behind the eyeball). A third branch traverses the chest, emerges superficially in the axilla at HT 1 (Jiquan), runs down the medial aspect of the arm (posterior to Lung and Pericardium), crosses the medial cubital crease at HT 3 (Shaohai), descends the anterior-medial forearm along the radial border of the flexor carpi ulnaris (FCU) tendon through HT 4, 5, 6, 7, traverses the pisiform bone into the palm at HT 8 (Shaofu), and terminates at the radial nail corner of the little finger at HT 9 (Shaochong).
Comprehensive Reference: Heart Channel Points
| Point | Pinyin / Translation | Category / Specific Function | Anatomical Location & Palpation | Needling Angle & Depth | Primary Clinical Actions & Exam High-Yields | Anatomical Structures at Risk / Safety |
|---|---|---|---|---|---|---|
| HT 1 | Jiquan (Highest Spring) | Entry point of Heart channel | Center of axilla, on medial side of axillary artery, in depression between pectoralis major and latissimus dorsi | Perpendicular 0.5–1.0 cun. Avoid axillary artery. | Unbinds chest, activates channel, relieves cardiac pain, axillary fullness, scrofula, arm hemiplegia | Axillary artery and vein, brachial plexus. Palpate the artery and insert medial to it, never into the vessel. |
| HT 3 | Shaohai (Lesser Sea) | He-Sea (Water point) | Midpoint of line connecting medial epicondyle of humerus and medial end of transverse cubital crease, with elbow flexed 90° | Perpendicular 0.5–1.0 cun | Clears Heart Fire and Phlegm-Fire; calms Shen (mania, depression); treats parkinsonian tremors, elbow pain, scrofula | Basilic vein, medial antebrachial cutaneous nerve, ulnar nerve nearby. |
| HT 4 | Lingdao (Spirit Pathway) | Jing-River (Metal point) | Radial border of flexor carpi ulnaris (FCU) tendon, 1.5 cun proximal to transverse wrist crease (HT 7) | Perpendicular 0.3–0.5 cun | Calms Shen, relieves sudden loss of voice, cardiac spasms, wrist/arm pain | Ulnar artery and ulnar nerve lie immediately medial to tendon. |
| HT 5 | Tongli (Penetrating the Interior) | Luo-Connecting point; Ma Danyang Heaven Star | Radial border of FCU tendon, 1.0 cun proximal to transverse wrist crease (HT 7) | Perpendicular 0.3–0.5 cun | Premier point for sudden aphasia, stuttering, or loss of voice after stroke; calms Shen, treats cardiac arrhythmia, palpitations, bradycardia | Ulnar artery and ulnar nerve. Avoid deep medial penetration. |
| HT 6 | Yinxi (Yin Cleft) | Xi-Cleft point | Radial border of FCU tendon, 0.5 cun proximal to transverse wrist crease (HT 7) | Perpendicular 0.3–0.5 cun | Premier point for acute severe night sweats (Dao Han) from Heart Yin deficiency; relieves acute cardiac pain, angina, hemoptysis, epistaxis | Ulnar artery and ulnar nerve. |
| HT 7 | Shenmen (Spirit Gate) | Shu-Stream (Earth point); Yuan-Source point; Sedation (Son) point; Ma Danyang Heaven Star | At wrist crease, in depression at radial border of FCU tendon, proximal to pisiform bone | Perpendicular 0.3–0.5 cun | Premier point in acupuncture to nourish Heart Blood/Yin and calm the Shen; treats intractable insomnia, dream-disturbed sleep, anxiety, palpitations, poor memory | Ulnar artery and ulnar nerve. Palpate tendon; insert needle strictly on its radial border without angling medially. |
| HT 8 | Shaofu (Lesser Mansion) | Ying-Spring (Fire point); Horary point | On palm, between 4th and 5th metacarpal bones, where tip of little finger rests when making a loose fist | Perpendicular 0.3–0.5 cun | Premier point to clear blazing Heart Fire; treats oral ulcerations, tongue aphthae, genital itching, dysuria, cardiac chest pain | Palmar digital vessels and nerves. Sensitive site. |
| HT 9 | Shaochong (Lesser Surge) | Jing-Well (Wood point); Tonification (Mother) point | Radial side of little finger, 0.1 cun posterior to the corner of the nail | Perpendicular 0.1 cun, or prick to bleed | Clears heat, opens orifices, revives consciousness; treats stroke coma, high fever, chest pain, palpitations | Digital vessels and nerves. |
Kidney Channel of Foot Shaoyin (KI 1 to KI 27)
The Foot Shaoyin Kidney channel originates on the underside of the little toe, traverses the plantar surface of the foot obliquely to KI 1 (Yongquan), emerges at the tuberosity of the navicular bone at KI 2 (Rangu), passes behind the medial malleolus at KI 3 (Taixi), circles down to the calcaneus, ascends the medial lower leg (crossing behind the Spleen channel), climbs the medial aspect of the popliteal fossa between semitendinosus and semimembranosus at KI 10 (Yingu), traverses the inner thigh, enters the tailbone/coccyx (intersecting Du 1), penetrates the Kidneys, and connects with the Urinary Bladder.
From the Kidney, an internal trunk climbs through the Liver, penetrates the diaphragm, enters the Lungs, ascends along the throat, and terminates at the root of the tongue. A chest branch leaves the Lung, links with the Heart, and disperses into the chest to join the Pericardium channel.
Superficially, the channel ascends the lower abdomen (0.5 cun lateral to midline from KI 11 to KI 21) and the anterior chest (2 cun lateral to midline from KI 22 to KI 27, ending below the clavicle at KI 27 Shufu).
Comprehensive Reference: Kidney Channel Points
| Point | Pinyin / Translation | Category / Specific Function | Anatomical Location & Palpation | Needling Angle & Depth | Primary Clinical Actions & Exam High-Yields | Anatomical Structures at Risk / Safety |
|---|---|---|---|---|---|---|
| KI 1 | Yongquan (Gushing Spring) | Jing-Well (Wood point); Sedation (Son) point | On sole of foot, in depression formed when foot is plantar flexed, approximately at junction of anterior 1/3 and posterior 2/3 of line from web between 2nd/3rd toes to heel | Perpendicular 0.5–1.0 cun | Grounds floating Yang, descends excess fire, revives consciousness; emergency rescue in acute stroke, severe hypertensive crisis, aphonia, insomnia, vertex headache | Plantar arterial arch, plantar nerves. Deeply sensitive point. |
| KI 2 | Rangu (Blazing Valley) | Ying-Spring (Fire point) | Medial border of foot, in depression anterior and inferior to the tuberosity of the navicular bone | Perpendicular 0.5–0.8 cun | Clears Kidney Deficiency (Empty) Heat; treats night sweats, nocturnal emissions, genital itching, irregular menses, diabetes (wasting-thirst) | Medial plantar vessels and nerves. |
| KI 3 | Taixi (Great Stream) | Shu-Stream (Earth point); Yuan-Source point | In depression between prominence of medial malleolus and the Achilles tendon, level with tip of medial malleolus | Perpendicular 0.5–1.0 cun, or directed toward BL 60 | Premier point to tonify both Kidney Yin and Kidney Yang; treats chronic lower back soreness, knee weakness, tinnitus, deafness, asthma, impotence | Posterior tibial artery and vein; tibial nerve. Palpate artery. |
| KI 4 | Dazhong (Great Bell) | Luo-Connecting point | Posterior and inferior to medial malleolus, in depression anterior to medial attachment of Achilles tendon | Perpendicular 0.3–0.5 cun | Strengthens will-power (Zhi), dispels fear, dementia, heel pain, dysuria, regulates Kidney Luo | Tibial nerve branch, calcaneal vessels. |
| KI 5 | Shuiquan (Water Spring) | Xi-Cleft point | 1 cun directly inferior to KI 3, in depression anterior and superior to calcaneal tuberosity | Perpendicular 0.3–0.5 cun | Regulates menses in acute dysmenorrhea, amenorrhea, uterine prolapse, acute hematuria | Posterior tibial vessels. |
| KI 6 | Zhaohai (Shining Sea) | Master (Confluent) of Yin Qiao Mai | 1 cun directly inferior to prominence of medial malleolus, in depression below lower border of medial malleolus | Perpendicular 0.3–0.5 cun | Premier point to nourish Kidney Yin, moisten dry throat, and clear empty heat; paired with LU 7 for Yin Qiao Mai; treats insomnia (cannot close eyes), night sweats, epilepsy | Posterior tibial vessels, tibial nerve branches. |
| KI 7 | Fuliu (Recovering Flow) | Jing-River (Metal point); Tonification (Mother) point | Medial lower leg, 2 cun directly superior to KI 3, on anterior border of Achilles tendon | Perpendicular 0.5–1.0 cun | Premier point to tonify Kidney Yang, resolve edema, and regulate sweating (pair with LI 4 for spontaneous sweating or anhidrosis); treats lumbar ache, cold limbs | Posterior tibial artery/vein, tibial nerve. |
| KI 8 | Jiaoxin (Intersecting Reach) | Xi-Cleft of Yin Qiao Mai | Medial lower leg, 0.5 cun anterior to KI 7, posterior to medial border of tibia, 2 cun superior to KI 3 | Perpendicular 0.5–1.0 cun | Regulates blood in uterine bleeding (Beng Lou), irregular menses, testicular pain, diarrhea | Great saphenous vein, tibial nerve. |
| KI 9 | Zhubin (Guest House) | Xi-Cleft of Yin Wei Mai | Medial lower leg, 5 cun superior to KI 3, on line connecting KI 3 and KI 10, at inferior border of gastrocnemius belly | Perpendicular 1.0–1.2 cun | Premier mental calming and systemic detox point (drug, alcohol, toxin clearing); treats mania, depression, phlegm in Heart | Great saphenous vein, tibial nerve. |
| KI 10 | Yingu (Yin Valley) | He-Sea (Water point); Horary point | Medial side of popliteal fossa, between semitendinosus and semimembranosus tendons when knee is flexed | Perpendicular 0.8–1.2 cun | Clears Damp-Heat in Lower Jiao; treats dysuria, genital pain, impotence, uterine bleeding, knee bi | Popliteal vessels laterally, tibial nerve. |
| KI 11 | Henggu (Pubic Bone) | Crossing with Chong Mai | Lower abdomen, 5 cun below umbilicus, 0.5 cun lateral to anterior midline (Ren 2) | Perpendicular 0.5–1.0 cun | Regulates lower burner, dysuria, impotence, hernia | Full urinary bladder. Empty bladder prior to needling. |
| KI 16 | Huangshu (Vitals Shu) | Crossing with Chong Mai | Middle abdomen, level with center of umbilicus, 0.5 cun lateral to anterior midline (Ren 8) | Perpendicular 1.0–1.5 cun | Regulates Middle/Lower Jiao, abdominal pain, constipation, cold hernia | Peritoneal cavity. |
| KI 21 | Youmen (Dark Gate) | Crossing with Chong Mai | Upper abdomen, 6 cun above umbilicus, 0.5 cun lateral to anterior midline (Ren 14) | Perpendicular 0.5–0.8 cun | Regulates Stomach, relieves vomiting, nausea, abdominal pain | Liver (on right), stomach. |
| KI 22 | Bulang (Corridor Walk) | Local thoracic point | Chest, 5th intercostal space, 2 cun lateral to anterior midline | Oblique or subcutaneous 0.3–0.5 cun along rib. Never perpendicular. | Cough, asthma, intercostal neuralgia, chest fullness | Visceral pleura, pneumothorax hazard; internal thoracic artery. |
| KI 27 | Shufu (Shu Mansion) | Local point | Chest, depression on lower border of clavicle, 2 cun lateral to anterior midline | Oblique or subcutaneous 0.3–0.5 cun. Never perpendicular. | Descends rebellious Lung Qi, relieves chronic asthma, coughing, chest oppression | Visceral pleura, pneumothorax hazard; subclavian vessels. |
Critical Safety Protocols: Neurovascular and Visceral Cautions
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| SHAOYIN ANATOMICAL SAFETY BENCHMARKS |
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| 1. HT 7, HT 6, HT 5 (Radial Border of FCU Tendon): |
| - Hazard: Ulnar Artery and Ulnar Nerve lie directly medial to the tendon.|
| - Protocol: Palpate tendon. Insert needle strictly on the radial side. |
| Never angle medially under the tendon into the ulnar neurovascular bed|
| |
| 2. HT 1 (Axillary Fossa): |
| - Hazard: Axillary Artery, Axillary Vein, Brachial Plexus trunks. |
| - Protocol: Palpate the axillary pulsation and needle medial to it, |
| perpendicular 0.5-1.0 cun, never into the vessel. |
| |
| 3. KI 21 to KI 27 (Thoracic Kidney Line - 2 cun lateral to midline): |
| - Hazard: Pleural cavity and visceral pleura (Pneumothorax). |
| - Lethal Hazard on Left: On the left thorax (intercostals 4-5 / KI 22-24)|
| perpendicular needle penetration can puncture the PERICARDIUM & HEART.|
| - Rule: Transverse/oblique insertion along intercostal spaces ONLY. |
| |
| 4. KI 11 to KI 16 (Lower Abdomen - 0.5 cun lateral to midline): |
| - Hazard: Peritoneal cavity, intestines, and distended urinary bladder. |
| - Protocol: Patient must void bladder immediately prior to treatment. |
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High-Yield Shaoyin Clinical Pairings
1. Sweat Regulation Pair (LI 4 + KI 7)
LI 4 (Hegu) and KI 7 (Fuliu) are the classical pair for regulating sweating. The effect depends on using opposite techniques at the two points. The Zhen Jiu Da Cheng (Great Compendium of Acupuncture and Moxibustion) records: for excessive sweating, first reduce LI 4, then reinforce KI 7; for scanty sweating, first reinforce LI 4, then reduce KI 7.
Some modern English-language texts give the directions the other way round, so learn the classical rule and the reasoning behind it. LI 4 (Yuan point of Hand Yangming) governs the exterior and the opening of the pores. KI 7 (Metal, mother point of the Kidney) regulates the body's fluids. For night sweats from Yin deficiency, KI 7 is also combined with HT 6 (Yinxi).
2. Post-Stroke Sudden Aphasia (HT 5 + Du 15 + Ren 23)
Because the Heart's Luo-Connecting vessel ascends directly to the root of the tongue, HT 5 (Tongli) is the primary distal point for post-stroke motor speech disorders (aphasia, dysarthria, stuttering). It is combined with Du 15 (Yamen) and Ren 23 (Lianquan) to restore speech articulation.
3. Anchoring Floating Yang in Hypertensive Crisis (KI 1 + LR 3)
When extreme Liver Fire or Liver Yang ascends unchecked due to deficient Kidney Water, the patient risks hypertensive encephalopathy, acute vertigo, tinnitus, and apoplexy. KI 1 (Yongquan) grounds the floating Yang, drains heat downward, and anchors the spirit, working synergistically with LR 3 (Taichong).
A 64-year-old male suffered an ischemic stroke three weeks ago. While physical rehabilitation has restored partial ambulation, the patient exhibits profound motor aphasia, struggling to articulate words and speaking with a severe stutter. Which point on the Heart channel is the Luo-Connecting point specifically indicated for sudden loss of speech and tongue stiffness post-stroke?
HT 3 (Shaohai)
HT 7 (Shenmen)
HT 5 (Tongli)
HT 9 (Shaochong)
An examinee is reviewing point locations along the medial volar aspect of the wrist. Which vital neurovascular structures lie immediately medial to the flexor carpi ulnaris (FCU) tendon, requiring the practitioner to insert needles strictly on the radial border of the tendon when needling HT 4, HT 5, HT 6, and HT 7?
The median nerve and radial artery
The cephalic vein and musculocutaneous nerve
The basilic vein and anterior interosseous nerve
The ulnar artery and ulnar nerve
A 52-year-old female presents with severe chronic insomnia characterized by difficulty falling asleep, waking frequently with a dry scratchy throat, hot flashes, five-palm heat, and night sweats. Physical exam reveals a thin, red tongue with fine cracks and absent coating, and a thready, rapid pulse. The practitioner selects the Confluent (Master) point of the Yin Qiao Mai to nourish Kidney Yin and clear Empty Heat. Which point is selected?
KI 6 (Zhaohai)
KI 3 (Taixi)
KI 7 (Fuliu)
KI 1 (Yongquan)
Which point pair is the classical combination for regulating sweating, using opposite reinforcing and reducing techniques at its two points?
LU 7 (Lieque) and KI 6 (Zhaohai)
HT 7 (Shenmen) and SP 6 (Sanyinjiao)
SP 4 (Gongsun) and PC 6 (Neiguan)
LI 4 (Hegu) and KI 7 (Fuliu)
Sections you finish are checked off in the contents.