Sidu TB-9

Chinese: 四渎

Pinyin: Sì Dú


5 cun distal to the lateral epicondyle of the humerus, between the radius and ulna. 

How to locate

Measure 5 cun distally from the lateral epicondyle of the humerus. Sidu TB-9 is located on a line connecting the midpoint of the dorsal wrist joint space and the lateral epicondyle of the humerus. 

Or: From the wrist joint space, measure 7 cun in a proximal direction and locate Sidu TB-9 in a depression between the extensor digitorum communis muscle and the extensor carpi ulnaris muscle.

Main actions

Benefits the throat and ears


Vertically or obliquely up to 2 cun. 

Commentary for Sidu TB-9

Sidu TB-9 is not a major point of the Triple Burner Channel.

Its main function is to benefit the throat and ears especially in the acute conditions. Typical symptoms are sudden loss of voice, obstruction of the throat, sore throat, sudden deafness, sudden tinnitus, etc.