Letter B
Blackouts
Also known as: Loss of consciousness, Syncope-like episodes
Blackouts symptom guide: what it can mean, possible causes, and when to seek care. Educational only.
Overview
Blackouts can result from low blood pressure, seizures, medicines, or heart problems. Some last only seconds; others leave a person collapsed. Every episode deserves professional assessment, especially if it recurs.
Possible causes
- Sudden low blood pressure
- Seizures
- Heart rhythm problems
- Alcohol or medicines
- Dehydration or low blood sugar
When to see a doctor
Get emergency care after a blackout, especially with injury, chest pain, or repeat episodes.