If you have leg pain, numbness or tingling, along with your back pain, you may have a pinched nerve. It may be called Lumbar Radiculopathy. The most common cause is usually a herniated disc.

Sciatica is pain along the sciatic nerve that goes along the back of your leg. This may be cause by lumbar radiculopathy, by compression of L4-S3 nerve roots, usually by disc herniations. Less commonly, it can also be caused by compression elsewhere, such as by the pyriformis muscle.

Other causes of back/ leg/ buttock pain may be inflammation or degeneration of the sacroiliac joint, and nerve compression by the pyriformis muscle (show from front and back below):

What else can we add or work on? Please let us know in the comments. No need to log in.