BL57

Chengshan

Star

承山 (Chéngshān) — Mountain Support

Bladder channel · point 57

Traditionally used for

  • Bowel health
  • Pain & joints

Location

On the back of the lower leg, in the depression formed below the belly of gastrocnemius when the muscle is contracted, about 8 cun below BL40.

How to locate: Ask the patient to point the toes; an inverted V appears where the two heads of the calf muscle meet, and the point is at its apex.

Fig. — BL57 · Calf
Bones of the leg — Gray's Anatomy plate
Bones of the leg Gray's Anatomy, 1918

Needling

Depth: 1.0–2.0 cun
Angle: Perpendicular

Functions

  • Relaxes the sinews and relieves cramp of the calf
  • Benefits the anus and treats haemorrhoids
  • Activates the channel and relieves lumbar pain

Indications

Cramping of the calf and leghaemorrhoids, anal prolapse and anal painlow back pain and sciaticaconstipationberiberi

Clinical Notes

The classical point for haemorrhoids — an indication with no obvious local logic, which the Bladder channel's divergent pathway to the anus explains.

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