BL 42 Acupuncture Point

Bladder 42, or Urinary Bladder 42, Abbreviated as BL 42 or UB 42, Transliterated Pohu in Chinese, Door of the Corporeal Soul in English.

BL 42 Acupuncture Point Location:

On the back, 3.0 cun lateral to the lower border of the spinous process of the 3rd thoracic vertebra.

BL 42 Acupuncture Point Indications:

  • Cough, asthma, pulmonary tuberculosis
  • Neck stiffness, pain in the shoulder and back

BL 42 Acupuncture Point Benefits:

Descends rebellious Lung Qi, relieves cough, activates the meridian, alleviates pain.


BL 42 is the outer Back-Shu of the Lung. Its special feature is that it helps treat the psychological/spiritual aspect of the Lung. So, it is generally used to treat prolonged sadness and grief.