Faint
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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
Just 3 minutes.
Developed by doctors.
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Content updated on Sep 6, 2022
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 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
Dissociative disorder is mental disorder that involve 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 and cause problems with functioning in everyday life.
- 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.
Related serious diseases
- Hypoglycemia
Low blood sugar levels. This can fatal as the brain depends on sugar for energy. It is usually caused by diabetes medications, but can also be caused by hormone disorders and insulin overproduction.
- Dehydration
- Atrioventricular block . sick sinus syndrome
- Tuberculosis (TB) (including scrofuloderma)
- Hyponatremia
- 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
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Developed by doctors.
Ubie is supervised by 50+ medical experts worldwide
Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan