Could you tell me what are best ways to relieve sciatic nerve pain?

Sciatic pain: The sciatic pain can be caused by spinal stenosis, ruptured disc, nerve impingement ... The treatment depends on the cause of the pain. You should seek help from a health care provider. You might benefit from a comprehensive evaluation.

Many options: I would suggest seeing a pain/spine specialist to evaluate you further to evaluate what level your problem is at and what can be done to treat you. There are interventional treatments besides medications and surgeries that might reduce or eliminate the pain altogether.