Which point is known as the Back Shu point for the Lung?

The Back Shu point for the Lung is identified as BL-13. This point is located on the bladder meridian and is situated on the back, corresponding to the Lung organ's function and energetics. Back Shu points are traditionally used in acupuncture to treat the associated organs and their related conditions by nourishing and balancing their qi (energy).

BL-13 specifically plays a significant role in conditions related to respiratory health, as it helps to enhance Lung qi and support the function of the Lung in terms of governing respiration and influencing the skin and body's defensive qi. Utilizing this point in treatment can help address issues such as asthma, cough, and other respiratory disorders, showcasing its crucial role in acupuncture practice concerning lung health.

In contrast, the other points listed, such as BL-11, BL-15, and BL-18, correspond to different organs: BL-11 is related to the bones and is particularly associated with the prevention of exterior pathogenic influences; BL-15 serves as the Back Shu point for the Heart; and BL-18 is designated for the Liver. Each of these points has its specific indications and applications but does not correspond to the Lung, which is why BL-13 is the accurate choice for the Back Shu point of the Lung.