Acupuncture Points Notebook

Location Guides:

: Zhongliao : Middle Crevice

Bl-33 : Foot Taiyang Bladder 33

Meeting of Bladder with Gall Bladder

Over the third posterior sacral foramen.

Perpendicular insertion 0.5 - 1 cun, or 1.5 - 2 cun through the foramen.

Contraindicated during pregnancy.

TCM Actions:
Regulates the lower jiao and facilitates urination and defecation
Regulates menstruation and stops leucorrhoea
Benefits the lumbar region and legs

TCM Indications:
  • Difficult urination and defecation, constipation, diarrhoea containing undigested food, retention of urine, painful urinary dysfunction, abdominal distension.
  • Leucorrhoea, irregular menstruation, scanty menstruation, infertility.
  • Lumbar pain, pain and cold of the sacrum and coccyx, cold sensation of the buttocks, atrophy disorder and painful obstruction of the lower limb.
  • The five taxations, the seven injuries and the six extremes.

    Superficial Innervation: Dorsal rami of S1 - S3
    Dermatome Segment: S3
    Deeper Structures: Sacral nerve S1 emerging from foramen

    One of the Baliao or "eight crevices" located in the sacral foramen which all regulate urination, defecation, menstruation and benefit the lumbar region and legs.


    Sacral Nerve Stimulation using an implanted device to electrostimulate this point has beeen adopted by modern surgeons to treat urinary urge incontinence and frequency (NICE guidelines). See also PTNS, a similar procedure at Sanyinjiao Sp-6.


    Reference Notes: (click to display)