What is the function of H-6?

H-6, which is also known as Yinxi, is classified as a Xi Cleft point. The function of Xi Cleft points is primarily to address acute conditions, pain, and to facilitate the flow of qi and blood. These points are particularly effective in treating situations where there is an excess of qi or blood, such as sudden pain or crises in a specific area associated with the channel that the point is on.

In this case, H-6, as a Xi Cleft point, is specifically indicated for issues related to the heart, such as chest pain or other acute heart conditions. Additionally, Xi Cleft points are thought to promote the cooling and calming of excess conditions, making them an important part of the acupuncture treatment toolkit for immediate or severe symptoms.

The other classifications mentioned in the options, such as Yuan Source points, Shu Stream points, and Exit points, serve different primary purposes, such as nourishing basic energy, regulating the flow of qi through larger channels, or facilitating the exit of qi and blood from a specific channel into areas of the body. However, for addressing acute issues and sudden pain, the function of H-6 as a Xi Cleft point is particularly relevant and appropriate.