When needling LI-5 (yangxi), which structure should be avoided?

When needling LI-5 (Yangxi), it is essential to avoid the cephalic vein. This point is located in the anatomical snuffbox, an area with several important structures, including veins. The cephalic vein runs laterally along the arm and is quite superficial, which makes it a significant structure to consider when needling.

Needling in the vicinity of this vein can lead to potential complications, such as hematoma or accidental puncture. Understanding the anatomy surrounding acupuncture points allows practitioners to needle safely and effectively while minimizing the risk to these important vascular structures.

The other structures mentioned, such as the ulnar artery and ulnar nerve, may also be relevant in terms of anatomical proximity, but the cephalic vein is notably more superficial, making it a critical structure to avoid specifically at this acupuncture point.