Sciatica related injuries lead to swelling around the restricted nerve roots. Since saturated fats are known to cause inflammation, they will intensify the pain. Until your sciatica has subsided, refrain from eating or drinking anything fried, processed, dairy-based, or containing red meat. Instead stick to an anti-inflammatory diet of fruits, vegetables, fish, grains like oatmeal and brown rice, beans, green tea, and fresh herbs and spices such as garlic and turmeric.