Which acupoint is known as the back shu for TH?

The back shu point for the San Jiao (TH, or Triple Heater) is located at BL-21, which corresponds to the area of the stomach on the bladder meridian. Back shu points are points located on the bladder meridian that correspond to specific organs, allowing for the treatment of issues related to those organs by influencing their energy and function.

In the case of BL-21, it serves as a connection to the San Jiao, facilitating the flow of Qi and addressing imbalances or conditions affecting this organ. These points are particularly useful in traditional Chinese veterinary medicine (TCVM) for diagnosing and treating issues by tapping into the body's energy channels.

The other options represent back shu points for different organs: BL-18 is for the liver, BL-22 for the triple burner (but more accurately associated with the spleen), and BL-24 relates to the bladder. Understanding which back shu point corresponds to which organ is essential for effectively utilizing acupuncture in TCVM treatments.