BL18 Ganshu Dog Acupuncture Point
Gān Shū 肝俞Professional veterinary acupuncture overview of BL18 Ganshu in dogs, including anatomical location, hepatic, ocular and emotional support applications, classical functions, point pairings, and safety notes.
| Chinese Name | 肝俞 |
| Pinyin | Gān Shū |
| Meridian | Bladder Meridian (BL) |
| Anatomical Location | 1.5 cun lateral to GV8, below the spinous process of T9. (第9胸椎旁开1.5寸) |
| Main Indications | Hepatitis, jaundice, eye disorders, hypochondriac pain, Liver Qi stagnation, dizziness, blurred vision, night blindness, epilepsy, emotional disturbance related to Liver disharmony. |
| Classical Function | Back-Shu of Liver; distributes Liver Qi, nourishes Liver Blood, cools damp-heat, moves Qi stagnation, benefits the eyes and sinews. |
| Meridian Color | 膀胱经 | Bladder Meridian | Water | Black / Deep Blue |
Clinical Overview
BL18 is one of the most clinically versatile back-shu points in veterinary acupuncture. As the Back-Shu of the Liver, it provides direct access to Liver organ Qi — bypassing the channel intermediary and reaching the organ more efficiently than distal Liver channel points such as LR3. This quality makes BL18 a foundational point in any TCVM protocol addressing hepatic function, ocular health, or the broad range of conditions governed by the Liver in Chinese medicine.
In TCVM, the Liver stores Blood, governs the smooth flow of Qi throughout the body, controls the sinews and tendons, opens to the eyes, and plays a central role in emotional regulation — particularly frustration, irritability, and constraint. BL18 therefore appears across a remarkably wide range of canine presentations, from active liver disease and jaundice to chronic eye conditions, musculoskeletal stiffness, seizure disorders, and stress-related behavioural patterns.
Peer-reviewed veterinary research supports BL18 as one of the most frequently identified sensitive Back-Shu points in dogs with hepatic and abdominal conditions, often found reactive alongside BL19 (Gallbladder Shu) and BL20 (Spleen Shu) in clinical examination.
Veterinary Disclaimer
This educational content is not intended to replace professional veterinary diagnosis or treatment. Acupuncture and electroacupuncture should only be performed by a licensed veterinarian or certified veterinary acupuncturist.
BL18 Canine Acupuncture Point Placeholder
Use this area for the canine BL18 anatomical map or your future TCVM illustration. BL18 lies at the T9 level, several segments caudal to the thoracic back-shu cluster of BL13–BL15, and is often palpated as a reactive tender point in dogs with hepatic or abdominal presentations.
Pinpoint Location
Anatomical Landmark
Locate the ninth thoracic vertebra (T9) by counting caudally from the withers along the thoracic spinous processes. Measure 1.5 cun laterally from the lower border of the T9 spinous process. BL18 lies on the medial branch of the inner Bladder line, directly below BL17 (Geshu, T7 level) and directly above BL19 (Danshu, T10 level). The corresponding lateral branch point at T9 level is BL47 (Hunmen), located 3 cun from the midline.
Needling Direction & Depth
Oblique insertion directed toward the spine at 0.5–1.0 cun is standard. Transverse-oblique insertion of 1.0–1.5 cun toward the spine may also be used and is often preferred to allow the patient to remain in a comfortable position during needle retention. Perpendicular needling or oblique needling directed away from the spine carries a substantial risk of pneumothorax and must be avoided. Moxibustion is applicable and particularly suitable for deficiency patterns such as Liver Blood Deficiency.
Primary Clinical Indications
BL18 addresses both organ-level hepatic conditions and the extensive range of body systems governed by the Liver in TCVM:
- Hepatitis & Liver Disease: The primary back point for hepatic disorders in TCVM. Clinical veterinary research identifies BL18 as one of the most commonly reactive tender points in dogs with hepatic conditions, alongside BL19 and BL20. Referenced in the Zhen Jiu Jia Yi Jing (Systematic Classic) for jaundice and hypochondriac pain.
- Jaundice: Classically documented across major acupuncture texts including the Ling Shu (Spiritual Pivot) and Zhen Jiu Da Cheng (Great Compendium) for this indication. Applied alongside GB34 and LR14 in damp-heat presentations.
- Eye Disorders: The Liver opens to the eyes in TCVM, making BL18 a key point for blurred vision, red eyes, and night blindness. Used for both Liver Blood Deficiency (blurred vision, dizziness) and Liver Fire rising (red, inflamed eyes).
- Liver Qi Stagnation: One of the most important points for moving stagnant Liver Qi — a pattern that in dogs may present as irritability, frustration-related behaviours, hypochondriac or flank sensitivity, and musculoskeletal tension. IVC Journal veterinary clinical sources specifically identify BL18 as a primary point for this pattern in canine liver disease protocols.
- Sinew & Tendon Conditions: The Liver governs the sinews in TCVM. BL18 is referenced for muscle cramps, tendon stiffness, and movement disorders where Liver Blood Deficiency or Liver Wind underlie the presentation.
- Epilepsy & Neurological Disturbance: Referenced for seizure disorders and Liver Wind patterns, particularly where emotional constraint and Liver Qi stagnation contribute to the neurological presentation.
- Emotional Disturbance: Addresses frustration, irritability, depression, and mania-depression patterns rooted in Liver disharmony. Peer-reviewed TCVM literature highlights BL18 as central to emotional rebalancing protocols involving Qi stagnation.
- Dizziness & Hypochondriac Pain: Used in both Excess (Liver Fire, damp-heat) and Deficiency (Liver Blood Deficiency) presentations involving the lateral costal region and vestibular disturbance.
Recommended Point Pairings
BL18 features in some of the most well-established pairings in classical and clinical TCVM, reflecting the Liver's extensive governance across body systems.
BL18 + LR14 (Qimen): The classical Back-Shu/Front-Mu pairing for the Liver. This combination powerfully clears damp-heat from the Liver and Gallbladder, and is the primary pairing for hepatitis, cholecystitis, and hypochondriac pain. One of the most foundational Liver treatment pairings in TCVM.
BL18 + BL17 (Geshu): BL17 is the Influential Point of Blood. Together these two points nourish Liver Blood and are the standard combination for dizziness, blurred vision, and night blindness due to Blood Deficiency. Tonifying needling technique or direct moxibustion is indicated.
BL18 + LR3 (Taichong): The clinical standard for Liver Qi stagnation in canine TCVM protocols. LR3 is noted to be very tender in dogs with liver issues; calming points such as GV20 or AnShen may be applied first before needling LR3. Together these points move Qi stagnation and support hepatic function.
BL18 + BL19 (Danshu) + GB34 (Yanglingquan): Combines the Liver and Gallbladder Back-Shu points with the Influential Point of Sinews and Gallbladder. A comprehensive protocol for clearing damp-heat affecting the Liver-Gallbladder axis, appropriate for jaundice and cholestatic presentations.
BL18 + SP6 (Sanyinjiao): SP6 crosses the three yin channels of the leg and is a primary point for nourishing Yin and Blood. This combination addresses Liver Yin Deficiency presenting with dryness, visual disturbance, and restlessness in dogs. Moxibustion at BL18 may be added for deeper tonification.
BL18 + BL19 (Danshu) + BL20 (Pishu): Clinically, these three adjacent back-shu points are frequently found reactive together in dogs with abdominal and digestive presentations. Peer-reviewed veterinary research (PMC3671677) documents their co-reactivity in canine abdominal pain and vomiting cases, supporting their use as a coordinated cluster in relevant protocols.
BL18 + BL1 (Jingming) + GB37 (Guangming): A TCVM-based ocular protocol combining the Liver Back-Shu with the primary local eye point and the Luo-Connecting point of the Gallbladder channel, which classically brightens the eyes. Appropriate for chronic ocular conditions with an underlying Liver pattern in dogs.
Modern Veterinary Interpretation
From a modern integrative veterinary perspective, BL18 is positioned at the T9 level of the thoracolumbar junction — a region neurologically associated with the upper abdominal viscera, including the liver, biliary system, and diaphragm. Stimulation in this area may influence segmental autonomic innervation relevant to hepatic blood flow and visceral pain modulation.
Published veterinary acupuncture research (PMC3671677) using an acupoint prescription flowchart in 102 dogs found BL18 to be among the most frequently identified reactive tender points in canine patients with abdominal pain, vomiting, and liver-gallbladder presentations — supporting its clinical relevance beyond classical TCVM frameworks. Integrative veterinarians may incorporate BL18 into multimodal management plans for dogs with chronic hepatopathy, portosystemic shunting, inflammatory bowel disease with hepatic involvement, or chronic ocular conditions, alongside conventional diagnostics and treatment.
Safety & Needling Notes
Professional Veterinary Use Only
Although BL18 is located at the T9 level where the thoracic cage offers some protection, deep or perpendicular needling at this location still carries a risk of pneumothorax. Oblique or transverse technique directed toward the spine is mandatory. Only trained veterinary acupuncturists should needle this point, with depth adjusted to the individual patient's size and body condition.
Hepatic Patients — Special Consideration
In dogs with confirmed liver disease, clotting parameters should be assessed prior to acupuncture where relevant, as hepatic dysfunction may affect coagulation. Acupuncture protocols including BL18 should be integrated alongside — not in place of — conventional hepatic diagnostics and management under veterinary supervision.
Gentle Acupressure Guidance
Pet owners exploring supportive acupressure at the BL18 region should use only gentle fingertip pressure. Note that dogs with active liver disease may show sensitivity at this location. Discontinue immediately if the dog shows signs of discomfort or stress. Acupressure is not a substitute for veterinary diagnosis or treatment.
Editorial & Veterinary Review
This educational resource was prepared by the PetAcu editorial team using veterinary acupuncture references, TCVM educational materials, canine rehabilitation resources, and integrative veterinary literature — including the Ling Shu (Spiritual Pivot), Zhen Jiu Jia Yi Jing (Systematic Classic of Acupuncture and Moxibustion), Zhen Jiu Da Cheng (Great Compendium of Acupuncture and Moxibustion), Me & Qi acupuncture databases, Giovanni Maciocia's clinical Back-Shu point analysis, IVC Journal veterinary TCVM resources, and peer-reviewed canine acupuncture research (PMC3671677).
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