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Dizziness & Fainting

A head rush when standing up too fast is expected, but dizziness—and vertigo and fainting—can leave you spinning, and needing to see a doctor.

All articles in Dizziness & Fainting

Understand your lightheadedness symptoms, including 8 causes & common questions.

Fainting, also called syncope, is a sudden, brief loss of consciousness. It can be caused by something minor like a drop in blood pressure, or it can be a more serious issue like an abnormal heart rhythm.

Long QT syndrome is an electric heart rhythm disorder that can cause fast, chaotic heartbeats. Severe symptoms are sudden fainting and seizures.

See Long QT Syndrome treatments

Dizziness is a common symptom that may occur if you don’t eat or drink enough, take certain medications, or have an inner ear problem. It’s rarely a sign of something life-threatening, but there are serious heart and neurological problems that cause it.

Reasons for your eyes rolling back while passing out may include orthostatic syncope, vasovagal syncope, or generalized tonic-clonic seizures. Read below for more information on causes of passing out and relief options.