What symptoms do i look for in head injuries from football?

See below: Concussions may present with: confusion, amnesia without loc, ha dizziness (vertigo or imbalence, lack of awareness of surroundings, nausea, vomiting, then later, mood and cognitive disturbances, light and sound sensitivity, sleep disturbances. More severe injuries may present with the above and slurred speech, memory deficits, loc, emotional lability, seizures or worse -a lucid period after loc.