After a severe head injury,which was in my childhood,I had head aches, had floaters in my vision, vertigo,and mood swings. I remember my grades went down drastically for a couple of years after that injury.I couldn't focus on any one thing at a time.My headaches transformed into migraines but disappeared miraculously in my adult life. Thank God. My grades went up again in highschool and I was able to focus.I could say there was slow improvement that happened as time progressed.All this is with out any medical help.