Is the belt required for your line of work? if so do you need to wear the belt when sitting. if the belt is for exercise not try not wearing it for a while.

Sciatica is normally caused by 1 of theses four conditions, mine is caused by the first condition
http://www.vitalityclinic.ca/article..._and_treatment (site my chiropractor told me about)

Condition #1- Herniated Discs
Pressure caused by a herniated or bulging disc. A herniation is when a disc protrudes out from between the vertebrae and this can either be caused by an event like a car accident, or, by months or years of uneven pressure due to muscle imbalances. This can sometimes cause sciatic pain, but it is also important to note that many people with herniated discs don't even experience pain or symptoms, and many don't know they have the condition.

Condition #2 - Piriformis Syndrome
The most common cause of sciatic pain and is created when pressure is placed on the sciatic nerve by the piriformis muscle. Muscle imbalances pull the hip joints and pelvis out of place and this changes the positioning of the piriformis muscle, which then places pressure on the sciatic nerve.
the sciatic nerve runs under the piriformis muscle the majority of the time... however, it occasionally will run through or around the piriformis...
Whatever the case, muscle imbalances will cause major problems and are the underlying cause of piriformis syndrome.

Condition #3 - Spinal Stenosis.
Pressure caused by spinal stenosis, which is a decrease in the space between the vertebrae. This is primarily caused by uneven pressure and compression due to muscle imbalances.

Condition #4 - Isthmic Spondylolisthesis
Pressure caused by Isthmic spondylolisthesis which is simply when a vertebrae slips or moves... this can sometimes pinch the sciatic nerve but often times people who have this condition don't have any sciatic pain, symptoms, or even know they have it!

If you are not sure which one of the four is causing your sciatica, I recommend you book an appointment to allow a professional to diagnose the problem. As most cases of sciatic pain are caused by joint malpositions and muscle imbalances, we usually begin to work on correcting the joints and often the muscle imbalances decrease. You may start to see improvement right away.... and likely eliminate your sciatic pain in a few weeks or less!

Sciatica comes about either due to a traumatic event, muscle imbalances, or a combination of both...