Sudden loss of consciousness and falling to the ground is clinically known as syncope. For the etiology of syncope, it can be seen clinically in the following aspects: First, cerebral vascular disease causes cerebral syncope, mostly in elderly people with arteriosclerosis and poor vascular elasticity. As the blood supply to the brain is interrupted, the patient can experience a brief loss of consciousness and can faint to the ground, which can also be accompanied by symptoms of neurological deficits. Second, syncope with sudden loss of consciousness and fall to the ground can also be seen as cardiogenic, which can be clinically seen in episodes of cardiac arrhythmias, such as premature ventricular beats or severe myocardial ischemia, and the patient can experience syncope. In cardiogenic syncope, the patient usually has palpitations and discomfort before the onset. Finally, sudden loss of consciousness and falling to the ground can also be clinically seen as vascular nerve-mediated syncope, also known as vasovagal syncope, which occurs after a change in position in young people, urinary syncope, or syncope due to hypoglycemia in some elderly people, and patients are advised to consult a hospital promptly.