Which acupuncture point requires the shallowest perpendicular insertion?

The acupuncture point that requires the shallowest perpendicular insertion is ST-2 (Si Bai). This point is located on the face, specifically below the eye and is used in various treatments related to facial issues and eyestrain. Insertion of the needle at this location is done with a very shallow angle to avoid damaging underlying structures, such as the eye and surrounding delicate tissues.

The other points mentioned are deeper or located in areas where a more perpendicular or deeper insertion is more appropriate to reach the therapeutic effect while considering safety. For instance, ST-1 (Cheng Qi) and BL-1 (Jing Ming) are closer to the ocular area and also require careful shallow insertion. However, ST-2 specifically necessitates the shallowest technique compared to the others due to its anatomical location. Understanding the context and anatomical considerations for each point enhances the practitioner’s ability to perform safe and effective acupuncture.