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Old 10-13-2016, 10:34 AM
Mark in Idaho Mark in Idaho is offline
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Mark in Idaho Mark in Idaho is offline
Legendary
 
Join Date: Feb 2009
Location: Somewhere near here
Posts: 11,418
15 yr Member
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There are guidelines. A concussion causes an immediate feeling of confusion, maybe dizziness, maybe a metallic taste in the mouth, maybe blurry vision. These will last for a few seconds to a few minutes, sometimes longer.

Local surface pain from a head contact without at least a moment of confusion or vision struggle is just a skin/scalp injury.
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