What anatomical structure should be approached with caution at ST-9?

At ST-9, also known as the “Shu-ting” point, practitioners should approach the carotid artery with caution due to its proximity to this acupuncture point. ST-9 is located on the neck, in the depression between the sternocleidomastoid muscle and the lateral aspect of the thyroid cartilage. The carotid artery runs vertically along the neck, and improper needling or manipulation of this area could lead to serious complications due to the critical blood flow it provides to the head and brain.

Understanding the location of ST-9 is essential for practitioners to avoid inadvertently injuring the carotid artery, which could cause significant hemorrhaging or even more severe vascular complications. Recognizing the anatomical landmarks and the vital structures in that area is paramount for safe and effective acupuncture practice.