Most definitely, I agree. It is a suggestion in which avenue you might want to investigate.
Hmm, Erikafox's comment made me think of anxiety. How does he feel when he has these episodes? It's still worth ruling out medical causes, but it could be something worth looking into.
Puberty. Hormones. No elevated CBC or C reactive protein.... It's not an infection inflammation like meningitis. It's most likely psychosomatic. Seek behavioural or cognitive therapy.
I can't help you much with this, but I can tell you a couple of things. First, feeling dizzy and off balance and seeing spots when you feel like you're about to faint is perfectly normal. Been there, done that. Loss of hearing starts in as well if you're really close to fainting. If for some odd reason he's feeling faint from blood rushing to his skin, that would cause flushing and warm skin. For me, exercising in the heat and getting dehydrated would do me in, but I would generally vomit instead of actually passing out.
Second, migraines don't have to come with auras (things like light spots). The auras can be different things, too. I've had ones where I was really dizzy and off balance, and once threw up because the room was spinning and tilting to the point where I got motion sick. But the headaches could be something completely different.
Hopefully the neurologist will be able to get to the bottom of it. Please let us know if you do find out what it is.