The nerves are compressed and people then experience the symptoms of pain, weakness, and numbness. Other conditions, such as spinal stenosis, spondylolisthesis, or piriformis syndrome can also cause sciatica symptoms by irritating the sciatic nerve.
Related Story: Get to know the Eurovision 2015 finalists. Map: Austria. Swedish singer Mans Zelmerlow has won the 60th Eurovision Song Contest, with Guy Sebastian coming in fifth for wildcard entry Australia.
Media caption Mans Zelmerlow was the bookmakers' favourite. Swedish singer Mans Zelmerlow has triumphed at this year's Eurovision Song Contest in Vienna, beating Russia's Polina Gagarina. Zelmerlow won with his upbeat pop track Heroes, which was accompanied by innovative animated visuals.