Bladder Meridian of Foot-Taiyang

Bladder Meridian of Foot-Taiyang originates from the inner canthus (Jingming (BL1) (Jingming (BL1))). Passing through the forehead, it flows up to the vertex and meets the DU Meridian at Baihui (GV20) (DU20).

A branch splits from the vertex and goes bilaterally down to the upper corner of the eat.

The straight line enters and connects with the brain from the vertex. It exits the brain at the neck region and bifurcates into two lines. One line runs straight downward (1.5 cun lateral to the mid-line of the back) to the lumbar region, entering the body cavity to connect with the kidney and join with the urinary bladder, forming a part of its meridian system. From there it descends along the posterior aspect of the thigh and ends in the popliteal fossa. Another line from the posterior aspect of the neck runs downward along the medial border of the scapula (3 cun lateral to the back mid-line). Passing through the gluteal region, it meets the proceeding branch descending from the next region to the lumbar region in the popliteal fossa. From there it descends to the posterior aspect of the gastrocnemius muscle and further to the lateral posterior side of the tip of the little toe (Zhiyin (BL67) Jing-Well Point (Zhiyin (BL67) Jing-Well Point)), where it communicates with the Kidney Meridian of Foot Shaoyin.
 
Pathological changes of BL

Dysuria, enuresis, mania or depression, malaria, eye pain, lacrymation on exposure to the wind, nasal obstruction, runny nose, epistaxis, headache, stiffness of the neck, pain of the lower back and hip region and along the course of the meridian on the posterior side of the leg.