What type of point is SI-4?

SI-4, also known as Wangu, is classified as a Yuan Source point. Yuan Source points are located on the channels and are particularly significant as they are thought to be the points where the original Qi (vital energy) of the organ is accessed. In the case of the Small Intestine channel, SI-4 is important for harmonizing the Small Intestine functions and is also used to address issues related to the wrist, as it is positioned at the proximal border of the fifth metacarpal bone.

Understanding the role of Yuan Source points is critical in acupuncture practice because they can be used not only for local conditions but also for nourishing the specific organ and restoring balance to its associated functions. This is distinct from other types of acupuncture points, such as Jing Well, Ying Spring, Shu Stream, and Exit points, which each have unique properties and applications.

By identifying SI-4 correctly as a Yuan Source point, practitioners can utilize its therapeutic potential for a range of conditions, both local to the area and systemic related to the Small Intestine.