Which xi-cleft point would be chosen for treating chronic one-sided low back pain?

For treating chronic one-sided low back pain, the most suitable xi-cleft point is located at BL-59, known as Fuyang. Xi-cleft points are significant in Traditional Chinese Medicine because they are thought to have a special relationship with acute conditions and the blood, making them particularly effective for treating issues related to pain.

BL-59 specifically targets the lower back and can effectively influence the Kidney channel's ability to handle not only back pain but other related conditions affecting the lumbar region. This point is associated with the Qi and blood of the Kidney system, which plays a crucial role in supporting the lower back.

The Kidney is also responsible for the health of the lower back, and activating BL-59 can help alleviate chronic pain by promoting circulation through the area and strengthening the Kidney system, essential for lower back health.

In this context, although other choices may relate to various conditions and channels, BL-59 is uniquely suited for addressing chronic pain issues located in the low back, particularly when one-sided.