What type of point is SP-21 categorized as?

SP-21, or Spleen 21, is categorized as an exit point. In traditional Chinese medicine, exit points refer to specific acupuncture points on a meridian where Qi (vital energy) is believed to exit from the channel into the body or influence the muscles and tissues. SP-21 is particularly known for its ability to affect the function of the spleen and its connection to the muscles, facilitating the distribution of Qi and blood throughout the body.

Understanding the role of SP-21 helps in recognizing its clinical applications, such as in strengthening the spleen, promoting digestion, and addressing issues related to the muscles and limbs. In contrast to other types of points, such as meeting points, which provide a connection between different meridians, or Xi Cleft points that are used to address acute conditions, SP-21's classification as an exit point highlights its focus on the outward flow of Qi from the spleen channel into the body.