There is no mention of sciatic nerve and specific remedies for it in our Islamic literature. Nonetheless in general for back pain and other joint pains we have some suggestions.
1. Keep the place warm Especially if the pain is related to cold seasons.
2. The use of olive oil and massaging with it.
3. Walking, stretching and light exercises
4. Consuming herbal tea with Honey, turmeric, cinnamon call mom flaxseed and black pepper