woman holding her forhead

Allergy Symptoms Checker – Dizziness, light-headedness or fainting

Dizziness/Light-Headedness Dizziness or light-headedness is usually caused by a decrease in blood flow to the brain.  This occurs in response to the slowing of the heart rate or a drop in blood pressure (hypotension).  In extreme cases, this can lead to a sudden loss of consciousness, or fainting (syncope) [1]. Hypotension and slowing of the …