A vasovagal reaction (also called vasovagal syncope) is sudden
dizziness or fainting that can be triggered by pain, fright, or trauma. You may sweat, feel lightheaded, nauseated, or tingly, and you may pass out if
the reaction continues.
A vasovagal reaction can happen without serious cause. But
vasovagal reactions may be caused by heart problems, epilepsy, or other
conditions that require treatment.
A vasovagal reaction can usually be relieved by lying down with your
legs elevated. But treatment is necessary if a medical condition is
causing the vasovagal reaction.
How this information was developed to help you make better health decisions.