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 and sciatica. If the sciatic nerve is injured or compressed, symptoms such as a dull or sharp radiating pain, numbness or weakness can originate from the lower back and travel down one side of the body. This can range from the buttocks or hips to the leg and foot.