Son 16 1/2 years old. Been having dizzy spells, passed out once. Says the dizzy spell comes on, then everything gets bright, then he says he feels like he is going to pass out. He eats good, does not do drugs, does not drink. He is not allergic to anything. Check his blood sugar last night after he got dizzy, bright lights and then felt fine and it was 118. Any idea what this could be or should I take him to the doctor an have them run tests.