Not every individual who has migraines will experience a headache when exposed to these triggers. If a person is unsure what his or her specific triggers might be, maintaining a headache diary can be beneficial to identify those individual factors which lead to migraine.
Football and ice hockey were the organized sports with the most concussion injuries, and snow skiing, bicycling, and playground injuries accounted for the most concussions occurring from non-team-related activities.
Concussions Most Common in Football, Hockey. Roughly half a million ER visits for concussions occurred among 8- to 19-year-olds between 2001 and 2005. About half were sports-related, and 40% of sports-related concussions involved children between the ages of 8 and 13.