BL4

Bladder Channel

Slanting Curve

曲差Qū Chāi

Anatomical location

0.5 cun above the anterior hairline, 1.5 cun from the midline, level with GV24 (Shenting) and lateral to BL3.

Main function

Expels Wind, clears the head and eyes, opens the nasal orifices, relieves headache.

Therapeutic indications

  • Headache
  • vertigo
  • dizziness
  • nasal congestion
  • epistaxis
  • blurred vision
  • eye pain
  • facial paralysis
  • stiff neck
  • pain in the upper body
  • Nasal obstruction

Name and classical tradition

Qucha, 曲差, combines 曲, curve, and 差, which can be read as "marked" or "prominent," or as a fork. The reading the reference works propose concerns the course of the channel: the Bladder channel, rising across the forehead, makes a sharp turn here near the hairline, in a winding area. It is a reasonable gloss, but no ancient text supports it.

The alternative name has a more concrete reference. According to a secondary work, the Zhenjiu Jiayi Jing (Systematic Classic of Acupuncture and Moxibustion) records it as 鼻衝, "nose thrust," because the point lies on the vertical line of the nose, where it rises to the hairline: "指穴當鼻旁直上入前際處." The Jiayi Jing passage on the name 曲差 has not been directly verified.

Other names

  • 鼻沖Jiayi Jing
Location of point BL4, Slanting Curve
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View point on the 3D modelBL4 on the anatomy
Needling techniqueSubcutaneous insertion 0.3-0.5 cun posteriorly or downward along the line of the channel. It can also be needled horizontally toward BL5 (Wuchu).
Depth0.3-0.5 cun
MoxibustionApplicable with caution (3-5 cones or 5-10 minutes)
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Protocols for the 20 patterns you see most in practice

Each pattern with its tongue, its pulse, the treatment principle and the points to tonify and disperse. Made for the treatment table, not the bookshelf.

Do you use BL4 with your patients?

In the Clinic you record it in the patient's file, next to the tongue, the pulse and the measurements, so at the next session you know exactly what you used. The Atlas is built in.

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