10. Anxiety and Irritability
Feeling anxious or irritable is a common symptom of a variety of conditions, such as, for example, depression. Moreover, unlike other symptoms of concussion, it can be trickier to notice yourself. You will probably attribute feeling anxious to the fact that you have had a traumatic incident which makes you feel a bit out of place.
In fact, personality changes are one of the most important points to take into account. People around you might notice how you have become more quiet and withdrawn than usual, which can indicate a brain injury. [4]