This is a problem that describes pain travelling down one or both legs. It can be accompanied by back pain, but not always. It can be caused by disc herniations, severe muscle spasms, degenerative arthritis, among other things.
How do you fix it? The first thing to do is to identify exactly what is causing sciatica by going through a comprehensive exam with the doctor. Based on the exam, imaging such as MRI may be needed to identify the exact location of the problem.
Treatment is usually very successful, but takes a little work and time. A major component of treatment is decompression to take pressure off nerves in the spine, and then rehab exercises to stabilize the area. Along with these therapies, other things are often useful to decrease pain and symptoms such as laser therapy.