10/22/2026
Not all “low back pain” necessarily starts in the low back.
Your sacroiliac—or SI—joints sit where your spine and pelvis meet. These small joints help transfer weight between your upper and lower body and play an important role every time you stand, walk, or climb stairs.
When an SI joint becomes irritated, you may feel discomfort around the low back, buttock, or hip, which is why it matters to identify where your pain is actually coming from.
Persistent low back pain? Let’s take a closer look.