Stretch: The sneeze is causing a localized vibration/trauma which causes the spine to shift and impinge upon the nerve rootlets..
Answered 4/17/2013
6.3k views
More pressure: Coughing, sneezing, or any other activity that causes one to strain or bear down increases the pressure in the abdomen, resulting in increased pressure inside of the disks of the spine. With a pinched nerve from a herniated disk, this causes the herniation to bulge a bit more, putting more pressure on the pinched nerve, resulting in increased pain.
Answered 2/18/2020
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