在背部，第2胸椎棘突下缘，后正中线旁开3寸。

注：本穴与内侧的风门(BL12)均位于第2胸椎棘突下缘水平。

In the upper back region, at the same level as the inferior border of the spinous process of the second thoracic vertebra (T2), 3 B-cun lateral to the posterior median line.

Note: BL41 and BL12 are located at the same level as the inferior border of the spinous process of the second thoracic vertebra (T2).

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