Define fainting.
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Fainting, also known as syncope, is a sudden, temporary loss of consciousness that occurs when the brain does not receive enough oxygen-rich blood. This loss of consciousness is typically brief, lasting only a few seconds to a few minutes. Fainting is often caused by a temporary drop in blood pressure and can be triggered by various factors, such as emotional stress, standing for long periods, or sudden changes in body position. While fainting is usually not serious and the person regains consciousness on their own, it can sometimes be a sign of an underlying medical condition that requires further evaluation.