Losing consciousness

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Sanshiro Kato

Medically Reviewed By:

Sanshiro Kato, MD

Emergency department

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People with these symptoms also use Ubie's symptom checker to find possible causes

  • 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

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

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

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Content updated on May 23, 2022

Description

A temporary loss of consciousness is known as fainting, sometimes known as passing out or syncope. A abrupt decrease in blood supply to the brain causes it. A typical incident lasts a few seconds to minutes. The majority of fainting spells are harmless.

When to See a Doctor

Seek professional care if you experience any of the following symptoms

  • Losing consciousness

Possible Causes

  • Anemia

    Anemia is a disorder in which the body's tissues don't get enough oxygen due to insufficient healthy red blood cells. There are several types anemia with various causes, the most common being iron-deficiency anemia which is a result of insufficient iron. Iron is required to produce haemoglobin, a substance in the red blood cells which help carry oxygen.

  • Dissociative disorder

  • Neurally mediated syncope

    Neurally mediated syncope or vasovagal syncope is a sudden drop in heart rate and blood pressure resulting fainting. Common triggers include strain, stress, long periods of standing, heat exposure or sight of blood or something unpleasant.

  • Dehydration
  • Hyponatremia

  • Hypothermia

Related Serious Diseases

Questions your doctor may ask about this symptom

Your doctor may ask these questions to check for this symptom

  • Have you currently regained consciousness after temporarily losing consciousness?

  • Have you lost consciousness due to being overwhelmed emotionally?

  • Did you feel lightheaded before losing consciousness?

  • Did you have any chest pain before losing consciousness?

  • Did you have palpitations before you lost consciousness?

Other Related Symptoms

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Sanshiro Kato

Medically Reviewed By:

Sanshiro Kato, MD

Emergency department

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