Knowledge Base/Acupoints/Sidu
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TE9 · 手少阳三焦经

Sidu sì dú · 四渎

Location. On the posterior aspect of the forearm, 5 cun distal to the olecranon, in the interval between the radius and the ulna.

The name means 'four rivers' (an old term for the four great waterways). It is recorded among the forearm points of this channel.

定位。在前臂后区,肘尖下5寸,尺骨与桡骨之间。

以「四渎」为名(古称江、河、淮、济为四渎),文献记载为本经在前臂的常用穴之一。

Classical record · not a treatment recommendation. Needling technique is a licensed practitioner's skill and is out of scope here.
The interval between the radius and the ulna here contains branches of the posterior interosseous nerve and vessels. Keep needling within the interosseous space and avoid deep or forceful insertion.

Other points on the Hand Shaoyang San Jiao

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