Circulatory Collapse and Fainting: First Aid

Short: A circulatory collapse usually results from a brief drop in blood pressure, leading to dizziness or brief loss of consciousness. In most cases it’s harmless and the person recovers within seconds to minutes.

In more detail: Common triggers include prolonged standing, heat, dehydration, shock, or standing up quickly from lying down.

Note: Not a substitute for medical advice.

In detail

• Recognizing warning signs: Dizziness, paleness, cold sweat, and vision darkening usually precede fainting.
• Immediate measures: The affected person should lie down and raise their legs to promote blood flow back to the heart.
• Loosening tight clothing: Collars, belts, or tight clothing should be loosened to avoid further restricting circulation.
• Providing fresh air: An open window or stepping outside can help, especially in stuffy, crowded rooms.
• After waking up: The person should stand up slowly rather than immediately remaining upright, to avoid fainting again.
• See a doctor if recurring: Repeated fainting spells, injuries from falling, or accompanying symptoms like chest pain require medical evaluation.
• Calling emergency services for prolonged unconsciousness: If unconsciousness lasts longer than about a minute or the person shows no normal breathing, emergency services should be called immediately (blutdruck-grundlagen, hitzschlag-und-sonnenstich-erste-hilfe).