Sciatica is the name given to pain caused by irritation of the sciatic nerve. Anything that irritates this nerve can cause pain, ranging from mild to severe. Sciatica is usually caused by a compressed nerve in the lower spine.
The main symptom is a shooting pain anywhere along the sciatic nerve; from the lower back, through the buttock, and down the back of either leg.
Other common symptoms of sciatica include:
This pain can range in severity and may be aggravated by sitting for long periods.