Hello sir, My brother who is 29 years old, had fallen on ground while running and it hit the back top of his head and at that time , he had a brain fog kind of where he is not knowing what is happening, and after sometime like nearly a few hours or a day he returned normal, this happened nearly 18+ years ago and recently he had a episode like our of a sudden he does not remember things recently happened like while playing games he suddenly forgets what key to press to play and also doesnot remember recent things like the previous games, movies he has viewed, after few minutes he had a headache and after few hours to this, his mind gets normal, he remembers everything and returns to normal. He has had aura migraine for nearly 18+ years. Can u please tell me what is happening and is this normal and not life threatening and not serious as he is very scared of it is any serious problem. And also can he continue with normal activities for eg,working, concentrate on his work, play games