I know that sciatica is very painful. However, before going for a back operations why not try out non-surgical options. The goal the relief for sciatica is to deal with the cause of the compressed nerve roots. One option to consider is to combine the specific exercise program with the heat/ ice packs.
Heat and ice packs are readily available to reduce the leg pain. Apply the pack (ice or heat) for about 20 minutes and repeat every two hours. You can also alternate the packs for relief. Very important is to consistently apply the packs especially in the initial state and combine this with an exercise program.
