Bladder meridian
BL-45 (Yìxǐ, 譩譆) — Surprise
- Meridian
- Bladder (BL)
- Anatomical view
- posterior
- Point classification
- Outer branch point of the Foot Taiyang Bladder channel.
- Depth reference
- 0.3-0.5 cun oblique downward; individual thoracic anatomy determines the safe limit
- Moxibustion
- Applicable as non-scarring moxa
- Reference aliases
- BL45; Yixi; 譩譆; Surprise
Anatomical location
On the upper back, level with the lower edge of the T6 spinous process and 3 body-cun from the posterior midline.
Traditional actions
Traditionally opens the chest, regulates qi, and relieves pain in the back and shoulder.
Recorded indications
Primary: Reference uses include cough, wheeze, chest fullness, shoulder-blade pain, and feverish disorders.
Secondary: Secondary uses include hiccup and abdominal distension.
How to read this reference
AcuAtlas separates anatomical location, traditional classification, recorded actions, indications, insertion-depth references, and moxibustion notes because these fields answer different study questions. The location statement is the orientation anchor. The classification and actions describe traditional reference categories, while indications summarize how checked educational sources associate the point with established teaching material. They are not a recommendation to select or stimulate the point.
Depth and moxibustion entries are reproduced as bounded reference notes rather than procedural instructions. Individual anatomy, technique, angle, clinical setting, and local professional standards can change what is appropriate. Review the cited documents and supervised training material before using any technical field. The normalized map coordinate is included only to place the point on the matching AcuAtlas body plate; it is not a substitute for palpation or anatomical assessment.
Sources
References displayed on this page were recorded with the point dataset.
- WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008) BL45, p. 122
- Acupuncture.com Point Locator - Urinary Bladder 45 Pinyin, indications, functions and needling
- eLotus CORE - Yixi BL 45 English name and direct point record
- TARA Acupuncture Knowledge Base BL 45: indications, method, moxibustion, thoracic innervation and vasculature
- WHO Guidelines on Basic Training and Safety in Acupuncture Section II, 5.2, chest and back; lung and pleura
Frequently asked questions
Where is BL-45 located?
On the upper back, level with the lower edge of the T6 spinous process and 3 body-cun from the posterior midline.
What reference actions and indications are recorded for BL-45?
Traditionally opens the chest, regulates qi, and relieves pain in the back and shoulder. The dataset lists these primary indications: Reference uses include cough, wheeze, chest fullness, shoulder-blade pain, and feverish disorders. Secondary indications are recorded as: Secondary uses include hiccup and abdominal distension.
Is BL-45 safe during pregnancy?
This dataset does not identify BL-45 as one of its five mandatory pregnancy-caution points. That is not a declaration of safety. Pregnancy-related point selection requires individualized assessment by a qualified clinician.