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In brief: Sciatic pain. Yes. Ice is an excellent anti-inflammatory option. Try alternating moist heat to relax muscles and ice to reduce swelling. Physical therapy and stretching exercises are important additions to reduce the pain and prevent recurrence of the pain.
Ice your back to reduce pain and swelling as soon as you injure yourself. Do it for 20-30 minutes every 3-4 hours for 2-3 days. You can also ice your back after physical activity. Apply heat to your back -- but only after 2-3 days of icing it first. Use heat on your back only after the initial swelling has gone down.