Hi hopefully someone out there can help me. My son 16 has had unexplained blackouts. He was hospitalised and given heart tracings, normal, but he has had more falls. My sons face is all bruised from a serious fall when he was on his own. I had to collect him from his friends , he was unconscious for around 15 mins and confused for around 3/4 hour. My son does not rememember anything about the blackouts just that he felt dizzy first.