0.1–0.2 cun obliquely in a superior direction or prick to bleed. Do not puncture the frenulum.
Yinjiao DU-28 is most used to clear Heat, especially from the eyes, gums and mouth. Therefore, it can treat symptoms such as swelling, bleeding and painful gums, blurred vision, pain and itchiness of eyes or canthus.
It also benefits nose and face and ease related disorders.