Vasovagal syncope

Definition:

Vasovagal syncope is the most common cause of fainting. Vasovagal syncope occurs when your body overreacts to triggers, such as the sight of blood or extreme emotional distress. The trigger results in vasovagal syncope (a brief loss of consciousness caused by a sudden drop in your heart rate and blood pressure), which reduces blood flow to your brain.

Prevention:

If you feel like you might faint, lie down and lift your legs. This allows gravity to keep blood flowing to your brain. If you can’t lie down, sit down and put your head between your knees until you feel better.

Treatment:

Vasovagal syncope is usually harmless and requires no treatment.