High risk of pneumothorax. Do not needle perpendicularly or deeply.
📍 Location (classical)
On the upper back, 3 cun lateral to the inferior border of the spinous process of the third thoracic vertebra (T3), at the level of BL-13 (Lung Shu point).
🧭 How to find it (practical)
Seated with the head flexed, locate the point below the spinous process of the third thoracic vertebra, 3 cun lateral to Shen Zhu (GV-12).
🔬 Anatomy
Trapezius and rhomboid major muscles.
💉 Needling
Oblique insertion toward the spine, 0.3–0.5 cun.
📜 Etymology
Po (魄), soul; Hu (户), dwelling. The Fei (Lung) houses the soul. The point lies at the level of Fei Shu (BL-13), as a dwelling for the Qi of the Fei (Lung).
