Fainting, also known in medical terms as syncope, is a sensation or situation in which an individual loses consciousness and becomes limp, but recovers shortly afterward, according to Johns Hopkins Medicine.
They further pointed out that fainting is rare in most people and is often not a serious concern. However, in some cases it can signal a risk of sudden cardiac death or lead to injury. If fainting episodes occur frequently, it is advisable to consult a doctor.
A recent study used experiments on mice to reveal the reasons for fainting. Research has shown that connections between the brain and heart lead to rapid loss of consciousness, followed by rapid recovery.