Causes of unconsciousness

Causes of unconsciousness 

Your son is experiencing what is typically known as light headedness, or dizziness. This could be a symptom, and most of the time, it is not a disease in itself. It is also usually temporary and mild and has no obvious cause.


Light headedness normally occurs when there is lack of blood reaching the brain. This can happen due to dehydration from vomiting, diarrhea, a sudden drop in blood pressure, or fever. Light headedness is also often a symptom of the flu, low blood sugar, common cold or allergies.


Serious conditions that can lead to light headedness include heart problems such as abnormal heart rhythm or heart attack. But since your son's reports in that area are normal, it is better to check out for alternatives. This problem can occur due to malnutrition, something that needs to be determined by a physician.

It could also be a problem with his eyes that could be causing him to pass out. This would also need to be checked out and eliminated. If he faints while giving blood, it could also be that he is simply afraid of needles. After eliminating all possibilities, if your son is still deemed as medically normal and fit, you would need to address this problem with a psychological bent, to see if there is any such cause for his fainting.