What type of point is SP-9, according to its classification?

SP-9, also known as Yin Ling Quan, is classified as a He Sea point. He Sea points are located near the knees or elbows and are traditionally associated with the transformation and transportation of fluids in the body. They have significant roles in addressing conditions related to the digestive system and are often used to regulate the Spleen and Stomach.

The He Sea points are particularly effective for issues related to disorders of the lower body and the corresponding organs. In the case of SP-9, it plays a crucial role in managing dampness and facilitates the movement of fluids, which further supports its classification as a He Sea point.

In contrast, Xi Cleft points are typically used for acute conditions and pain, Exit points are where Qi exits in the channels, and Entry points are where Qi enters. While these classifications serve important functions in acupuncture practice, SP-9's role as a He Sea point is most relevant to its location and the physiological functions it supports within the Spleen channel.