Sciatica is pain that originates in the lower back or buttocks and radiates down one thigh to below the knee, usually into the foot. The pain is often persistent and more severe than a run-of-the-mill backache.
Do you really need to drink eight glasses of water a day to prevent dehydration and stay healthy? No one knows where this myth came from originally. But today, this claim is often made by (no surprise) the bottled water industry.