15 yr old dizzy sometimes blackout 5-10 seconds

[sprinkles77]

My 15 year old son has been getting very dizzy along with his vision blacking out around edges and in extreme cases blackout for 5 seconds.  Apparently it has happened for about two monthsbut just dizzy spells where he would lean against a wall then move on.  He did not want to tell me until we saw it happen. Recently it has gotten worse he has had two blackout episodes 7 and 10  days ago one last night.  Theses three he had gotten up walked around  10-20 feet begore hr got dizzy blurred tunnel like vision tried to laydown in order not to fallbut must have blacked out in the lying down process since he hit the wall a bit harder than him laying himself down.  He was unrezponsive for around 5 seconds and his pupils were huge.  He said he heatdvus call him but only once not 3 times!    Once I noticd coupled with a sinus infection and severe headache.  I do have a doctors appointment for him.  I have him tracknig episodes, symptoms, food, any physical labor, So he can  give doctor as much info as possible.  Is there anything else i should have him track?
He is physically fit, healthy other than enviromental allergies, and headaches usually due to allergies or stress but not always.     He does not eat super healty since is tries to skip breakfast.  No drug usage.  

His granny and father are hypoglycemic, granny has heart issues since her late 30s.  His great granny had tumors on her brain.  Otherwise everyone is healthy in his family.  When he had an episode he had his BP checked immediately after it was 132 over 78.  The one 132 seems a bit higher than normal for him he is usually around 100.  I have noticed these episods all seem to happen after he gets and walks 5--20 feet.  It never happens while sitting or if he has been up and moving.  
Please help me he is scared and am I.  I want yo make sue I give his doctor all necessary info to diagnose without 50 tesets stresding him out.  He is very scared.  Thank you.

[c15]

whatch what food he eats when he does this and keep him from getting to hot.

[sprinkles77]

All my sons labs were good.  The doctor did say it was posdible that it was slight case a dehydration so he has to drink 3 more cups of water a day than normal. Though sugar has pretty much been ruled o http://www.southernsavers.com/category/other-grocery-stores/ ut DS has to check his sugar after any event.  It was 86 right after he got dizzy  yesterday.  The doctor also is going to have him wear a heart monitor for 30 days to see if his rythym is off.   Sigh...I was hoping this would be something simple.

[Anonymouse88]

Well, hypoglycemia can cause you to feel faint and start blacking out.  Make sure he's eating plenty of protein at every meal (try an egg for breakfast instead of a pastry, for instance).  You could also have him carry some sugar packets or something else really sweet, and have him pour them in his mouth and let the sugar sit there for a while the next time he feels faint.  If it is hypoglycemia, the sugar absorbing through the mouth will help.

Dizziness upon standing can be orthostatic hypotension, which is where the blood stays at the level it was when you were sitting for a while after you stand, so there isn't enough for the brain.  Clenching your stomach and pushing down like you're straining on the toilet can help push the blood up to the head.  

I'm guessing the doctor will want to check out his heart to make sure it isn't causing the issue, but I don't know enough about heart problems to say what the issue could be.  

And tell your son that if he thinks he's going to pass out, he should lie down.  This helps restore blood flow to the brain, and if you he does pass out, he'll be on the floor anyway, but he'll also have fallen to get there, which can cause bumps and bruises at the very least.