Faint
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Reviewed By:

Maxwell J. Nanes, DO

Maxwell J. Nanes, DO (Emergency department)

Dr Nanes received a doctorate from the Chicago College of Osteopathic Medicine and went on to complete a residency in emergency medicine at the Medical College of Wisconsin. There he trained at Froedtert Hospital and Children's Hospital of Wisconsin in the practice of adult and pediatric emergency medicine. He was a chief resident and received numerous awards for teaching excellence during his time there. | | After residency he took a job at a community hospital where he and his colleagues worked through the toughest days of the COVID-19 pandemic. |

Yoshinori Abe, MD

Yoshinori Abe, MD (Internal medicine)

Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.

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Content updated on Jan 4, 2023

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  • Temporary loss of consciousness

  • Felt "floaty" and almost in a trance after recovering from fainting / seizure

  • Passed out / blacked out after sitting in the same position for a long time

  • Can't see half of my usual visual field after I woke up from my seizure

  • Checking my blind spot when driving nearly made me faint or black out

  • Before the seizure happened there were sounds or whispers in my head

  • Fell unconscious but those around me said I was staring at something

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About the Symptom

A temporary loss of consciousness is known as fainting, sometimes called passing out or syncope. It occurs due to a sudden decrease in blood supply to the brain. A typical episode lasts a few seconds to minutes. Most fainting spells are harmless.

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Losing consciousness

Possible causes

Generally, Faint can be related to:

  • QT prolongation syndrome

    QT prolongation syndrome is a heart signaling disorder that can cause fast, chaotic heartbeats (arrhythmias). It can be present from birth or develop later in life due to certain medical conditions, specific drugs, or mineral imbalances.

  • Neurally mediated syncope

    Neurally mediated syncope, also known as vasovagal syncope, is a sudden drop in heart rate and blood pressure that results in fainting. Common triggers include strain, stress, long periods of standing, exposure to heat, or emotionally upsetting situations (such as sight of blood).

  • Breath holding spells

    A condition sometimes seen in young children. Spells most commonly occur around one year of age with a range of six months to four years. Up to 15 percent of cases may have an initial episode below the age of six months. The child may stop breathing for up to 1 minute, causing them to lose consciousness and tone. Although alarming to parents, this condition is common and can happen in healthy children, who will grow out of it as they age. Triggers for spells include frustration, pain, or fear.

Related serious diseases

Sometimes, Faint may be related to these serious diseases:

Doctor's Diagnostic Questions

Your doctor may ask these questions to check for this symptom:

  • Have you temporarily lost consciousness?

  • Have you ever passed out from overwhelming emotions?

  • Did you feel dizzy before passing out?

  • Did you have chest pain before passing out?

  • Did you have heart palpitations before you fainted?

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Reviewed By:

Maxwell J. Nanes, DO

Maxwell J. Nanes, DO (Emergency department)

Dr Nanes received a doctorate from the Chicago College of Osteopathic Medicine and went on to complete a residency in emergency medicine at the Medical College of Wisconsin. There he trained at Froedtert Hospital and Children's Hospital of Wisconsin in the practice of adult and pediatric emergency medicine. He was a chief resident and received numerous awards for teaching excellence during his time there. | | After residency he took a job at a community hospital where he and his colleagues worked through the toughest days of the COVID-19 pandemic. |

Yoshinori Abe, MD

Yoshinori Abe, MD (Internal medicine)

Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.

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