Sciatica is a common condition characterized by pain that radiates from the lower back through the buttocks and into the legs. It occurs when the sciatic nerve, which runs from the lower back through the back of each leg, becomes compressed or irritated. Symptoms include sharp pain and burning sensations along the path of the sciatic nerve. The pain is usually only on one side of the body and can worsen with coughing or sneezing. Sciatica may be caused by spinal issues like herniated discs or bone spurs that pinch the sciatic nerve. Maintaining a healthy weight, exercising regularly, and having proper posture can help prevent sciatica.