Sciatica is a condition that causes an ache or tingling down the back hips thighs and all the way through the legs. This pain is usually the result of a compression or inflammation of the sciatic nerve. This is the longest nerve in the body. If you look around you will notice that many people around you seem to be complaining of this kind of pain. One major reason for this may be long sitting hours. Most people with desk jobs tend to sit continuously in one position without moving. This may affect or even damage the sciatic nerve and