“Da” is big or great. “Shu” means the shutter, referring to the 1st thoracic vertebra, which was called the shutter bone in ancient times. The point is at the lateral end of the shutter bone, hence the name Dashu (Big Shutter).
1.5 cun lateral to the lower border of the spinous process of the 1st thoracic vertebra.
Influential point for Bones
Sea of Bones with ST37 & ST39
Pain of the posterior aspect of the neck.
Cough, asthma and common cold with fever (combine with Dazhui (GV14), Hegu (LI4) and Feishu (BL13)).
Eliminate pathogenic wind.