How to find

For orientation in the lumbar region, first, determine the Tuffier’s line. Place both hands directly superior or lateral to the highest points of the iliac crests, joining the thumbs on the midline at the lumbar spine. In most cases, this line intersects with the spinous process of L4 (note: this may change depending on the patient’s position; for more detail on orientation in the lumbar/ sacral region). Next, locate the lower border of the spinous process of L5 and, on this level, locate BL-26 1.5 cun in a lateral direction.
Located on the same level are Ex-B-8 (on the midline) and a point of Ex-B-2 (0.5 cun lateral to the midline).


1.5 cun lateral to the posterior midline, on the level of the lower border of the spinous process of the 5th lumbar vertebra (L5).


  • Strengthens the back, especially for Kidney deficiency syndromes
  • Regulates the Lower Heater