There are many reasons for short-term syncope, considering that it may be caused by simple syncope or heart disease, insufficient cerebral blood supply and other reasons. It is recommended that patients go to the hospital in time for examination and treatment under the guidance of doctors. 1. Simple syncope: simple syncope, also known as vasovagal syncope, may be caused by abnormal vascular regulation mechanism. It is related to excessive fatigue, physical weakness, prolonged standing, lack of exercise and so on. 2. Heart disease: generally common is sinus bradycardia, patients with sick sinus node syndrome caused by syncope. Due to arrhythmia caused by the heart to pump less blood, causing insufficient blood supply to the brain, and transient syncope. 3. Insufficient cerebral blood supply: generally due to blood circulation disorders in the blood vessels of the brain, thus causing the symptoms of transient syncope, which can be treated with aspirin, clopidogrel and other medications under the guidance of a doctor. Short-term syncope, such as frequent episodes, it is recommended that patients seek timely medical attention to identify the causes of targeted treatment.