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.
In organized high school sports, concussions occur more often in competitive sports, with football accounting for more than 60% of concussions. For males, the leading cause of high school sports concussion is football; for females the leading cause of high school sports concussion is soccer.