The schemas are a set of 'types', each associated with a set of properties. The types are arranged in a hierarchy.he schemas are a set of 'types', each associated with a set of properties. The types are arranged in a hierarchy.
Inadequate stretching and warming up prior to exercise, or advancing your exercise program too quickly, or beginning a new exercise program, have all been known to cause symptoms. In some people, just vigorous walking or exercising on uneven ground is enough to exacerbate a flare-up of sciatica nerve pain.
The sciatic nerve is the longest nerve in the body, going from the pelvis, through the buttocks, down the legs to the feet. Having a prolapsed disc (also known as a ' slipped disc') in the back is a most common cause of sciatica, but sometimes doctors do not find an obvious cause of the pain.