OVERVIEW:

Sciatica is a common type of pain affecting the sciatic nerve, a large nerve extending from the lower back down the back of each leg. Sciatica usually affects only one side of the lower body. Often, the pain extends from the lower back all the way through the back of the thigh and down through the leg. Depending on where the sciatic nerve is affected, the pain may also extend to the foot or toes.

COMMON SYMPTOMS:

Pain in the rear or leg that is worse when sitting
Burning or tingling down the leg
Weakness, numbness, or difficulty moving the leg or foot
A constant pain on one side of the rear
A shooting pain that makes it difficult to stand up

CAUSES: 

Sciatica is caused by irritation of the root(s) of the lower lumbar and lumbosacral spine. Lumbar spinal stenosis, Degenerative disc disease, Spondylolisthesis, or Pregnancy are all other types of common causes.