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Home > Education > Acupuncture Point Location > Small Intestine Meridian Index > SI 3

Small Intestine 3

Chinese Name: Houxi (English translation: Back Stream)

Location:  When a loose fist is made, the point is on the ulnar aspect of the hand, proximal to the 5th metacarpophalangeal joint, at the end of the transverse crease of the metacarpophalangeal joint, at the junction of the red and white skin.

Classification: Shu-Stream point of the Small Intestine Meridian
Master Point of the Du Meridian (couple with UB 62)


  • Pain and rigidity of the head and neck, malaria, pain in the lumbar and sacrum, acute spasm in the finger, elbow and arm
  • Manic psychosis, epilepsy
  • Deafness, eye congestion

Functions: Benefits the neck and back, activates the meridian, expels exterior Wind, regulates the Du meridian, calms the Shen, treats malaria.

Notes: SI 3 is an excellent point for neck and back issues when coupled with UB 62. Shu-Stream points are where the qi starts to pour down the meridian. They are known to alleviate heaviness and pain in the joints. On Yin Meridians, Shu-Stream points are identical to the actions of Yuan-Source points.

Needling: Perpendicular insertion .5 - 1.0 cun.

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