Perhaps this myth has already been busted, but is it true that if you hold in your sneeze (i.e. plug your nose) you'll lose brain cells? How can this be empirically tested?
It is unlikely that a held in sneeze can actualy cause brain damage/burst neurons. It can, however burst blood vessels from a large increase in pressure. An increase in pressure in the nasal cavities could result in other adverse effects. In some individuals holding in a sneeze may actually cause the eyes to pop out of placem (if held open). Another possibility is your ears "popping." Your ear drums may actually rupture from a rush of air entering the eustation tubes.
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