Swoon, or fainting, is a temporary loss of consciousness caused by a decrease in blood flow to the brain. This can happen due to various factors, including dehydration, low blood sugar, or emotional stress. When someone faints, they usually fall to the ground, which helps restore blood flow to the brain. The medical term for fainting is syncope. It is often harmless, but it can sometimes indicate an underlying health issue. If fainting occurs frequently or is accompanied by other symptoms, it is important to seek medical advice to rule out any serious conditions.