K-4 serves what function in acupuncture?

K-4, also known as Gongsun in Traditional Chinese Medicine (TCM), is classified as the Luo-Connecting point for the Kidney channel. The Luo-Connecting points serve an essential function in the acupuncture system by connecting the primary channel with its associated branches and providing a link to the Yin or Yang paired organ. Specifically, Luo points help in facilitating the flow of Qi and blood while also enhancing the connection between the primary channel and its related organs or tissues.

In the case of K-4, it plays a pivotal role in addressing conditions related to kidney Qi, emotional health, and supportive functions for the bladder as it connects with the bladder channels, thus enabling a broader therapeutic impact in clinical practice. Its use can be particularly beneficial for issues such as fear, anxiety, and conditions related to the kidneys and their function of water metabolism.

The other options represent different point categories. Xi Cleft points, for instance, are primarily utilized for acute conditions and pain by facilitating the flow of Qi and blood. Yuan Source points are involved in tonifying the organ's energy, while Shu Stream points are effective for resolving dampness and heaviness in the body. Each point category serves unique therapeutic roles, but in the case of K-4,