How to find

For orientation in the lumbar region, first, determine the Tuffier’s line (a line connecting the highest points of the iliac crests), which in most cases intersects with the spinous process of L4 (note: this may change depending on the patient’s position). From there, count upward to the lower border of the spinous process of L1 and, on this level, locate BL-22 1.5 cun in a lateral direction, on the highest point of the paraspinal musculature. Located on the same level are GV 05 (Suspended Pivot) (on the midline), a point of Ex-B-2/BL 51 (Vitals Gate)/Ex-B-4 (0.5 cun/3 cun/3.5cun lateral of the midline).


1.5 cun lateral to the posterior midline, on the level of the lower border of the spinous process of the 1st lumbar vertebra (L1).


  • Regulates the Triple Heater
  • Opens the water passages and promotes urination
  • Has an effect on the shaoyang


Back-shu point of the Triple Heater. Especially regulates the relationship between the Middle and Lower Heater.