Sciatica is low back pain combined with pain that radiates through the buttock and down one leg. It is caused by irritation of the sciatic nerve, which is the largest nerve in the body. The most common cause is a herniated disc between the vertebrae in the lower back, which can put pressure on the sciatic nerve. Symptoms include a deep, severe pain that starts in the lower back and shoots down one leg, especially with certain movements or actions like sneezing or coughing. Unani treatment options include herbal powders, oils, and wet cupping to relieve pain and pressure on the sciatic nerve.