I have copied this out for you, it happens quite frequently While there are uncommon serious causes of passing out
in children, the majority of
fainting episodes are brought about by reasons that are neither serious nor life-threatening. The most common reason for fainting in children is called vasovagal syncope [VAY-so-VAY-gull SEENK-oh-pee).
Vasovagal syncope is an abnormal reaction of the nerves to otherwise normal circumstances. These nerves dictate the heart rate and blood pressure.