A Manual of Acupuncture: Posterior to the ear, in a small depression on the mastoid bone, one third of the distance along a curved line drawn from Yifeng SJ-17 to Jiaosun SJ-20 following the line of the rim of the ear.
Chinese Acupuncture and Moxibustion: In the centre of the mastoid process, at the junction of the middle and lower third of the curve formed by Yifeng (SJ-17) and Jiaosun (SJ-20) posterior to the helix.
Puncture subcutaneously 0.3-0.5 inch or prick with a three-edged needle to cause bleeding. Moxibustion is applicable.
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