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The difference between a concussion sign and a concussion symptom is that a sign of concussion is one that can be noticed, seen or observed while a symptom is something only the athlete feels or experiences.

Omega-3 fatty acids may help memory recovery after concussion suggests a 2011 study in rats.  Given their other health benefits, it is "hard to see the harm" of consuming a fish oil supplement after head injury, says Dr. William P. Meehan, III.

After a sports concussion physical and mental (e.g. cognitive) rest are keys to recovery, says Dr. William P. Meehan, which means no video games, homework, or other activities that tax the brain and force it to work extra hard.

When it is safe for a youth or high school athlete to return to play contact or collision sports after symptoms of concussion clear depends on many factors, says Dr. William Meehan, including the athlete's age, baseline test data, time symptoms take to clear and severity, and concussion history.