Sciatica is a common problem. The lifetime prevalence of low back pain is around 70%.

Many patient belive that all sciatica is due to herniated disc.....,this is very common myth.

Sciatica can have a number of causes, such as a herniated disc (often referred to as a slipped disc). This occurs when one of the discs that support the vertebra (the individual bones that make up your spine) gets temporarily pushed out of position and presses on your sciatic nerve. (Quote from NHS choice)

But,in my practice experience,Disc area inflammatory factors produced by the disc nucleus (perhaps in association with mechanical trauma) will irritate nerves,this is possibly main reason of sciatica

As different reason,the treatment would be different.That's why some technique like traction doesn't work.and do you think another....work?

What's your opinion?