Pang Guang Shu (BL28)
📍 Location
In the sacral region, below the spinous process of the 2nd sacral vertebra, 1.5 cun lateral to the midline, around the 2nd posterior sacral foramen.
🏥 Indications
Back-shu point of the bladder: difficult urination, urinary frequency, enuresis, urinary retention, low-back pain, diarrhea, and constipation.
🖐️ Stimulation method
Perpendicular or oblique insertion 0.8–1.2 cun.
⚠️ Contraindications
No special contraindication for pressure; needling by a trained practitioner.