Hip pain that radiates down the leg can be caused by multiple mechanisms within the hip joint, SI joint, or the muscles, tendons, and nerves in this area. Possible causes include sciatica, arthritis, ...

The lumbosacral joint, also called L5-S1, is a term used to describe a part of the spine. L5-S1 is the exact spot where the lumbar spine ends and the sacral spine begins. The lumbosacral joint ...