When a person suffers repeated concussions, the trauma can lead to a severe long-term condition called chronic traumatic encephalopathy (CTE). CTE is a degenerative disease that causes brain inflammation, and unfortunately, it can only be diagnosed at autopsy. As a result, experts are still trying to understand the extent of its repercussions, but it is associated with post-concussive syndrome, second impact syndrome, and the development of dementia.