Faint
Free Symptom Checker
with Physician-supervised AI
Reviewed By:
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 (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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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
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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Content updated on Jan 4, 2023
About the symptom
A temporary loss of consciousness is known as fainting, sometimes known as passing out or syncope. An abrupt decrease in blood supply to the brain causes it to happen. 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 where the body's tissues don't receive enough oxygen due to a lack of healthy red blood cells. There are several types of anemia with various causes, the most common being iron-deficiency anemia, which results from insufficient iron. Iron is needed to produce hemoglobin, a substance in red blood cells that helps carry oxygen.
- Dissociative disorder
Dissociative disorder is a mental disorder that involves experiencing a disconnection and lack of continuity between thoughts, memories, surroundings, actions, and identity. People with dissociative disorder escape reality in ways that are involuntary and unhealthy, causing problems with functioning in everyday life.
- 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 the sight of blood or something unpleasant.
- Migraine
- Atrial fibrillation (AF)
Related serious diseases
- Atrioventricular block . sick sinus syndrome
These conditions involve issues with the heart's electrical conduction system. Signals may be transmitted too fast, too slow, or not at all to some areas of the heart. Both men and women are affected, and the risk increases with age.
- Hyponatremia
- Dehydration
- Epilepsy
- Hypothermia
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
Similar symptoms or complaints
Symptoms from the same body system / part
Reviewed By:
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 (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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Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan