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No. Read it again. Here's one for you
Sciatica most often happens when a herniated disk or an overgrowth of bone puts pressure on the lumbar spine nerve roots. This happens "upstream" from the sciatic nerve. This causes inflammation, pain and often some numbness in the affected leg. https://www.mayoclinic.org/diseases-conditions/sciatica/symptoms-causes/syc-20377435
Interesting. Some other sources also list inflammation as cause, like this one:
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