Syncope due to glossopharyngeal neuralgia or other visceral disease: this type of syncope is rare. Transient syncope occurs during lingual-pharyngeal neuralgia, biliary colic, renal colic, bronchial or gastrointestinal endoscopy. It is associated with severe pain and excessive reflex responses of visceral receptors. So, how do patients present with syncope caused by glossopharyngeal neuralgia or other visceral diseases for differential diagnosis? The following is a brief introduction: 1, urinary syncope (micturition syncope): almost all patients are male, most middle-aged patients, syncope occurs in standing urination or just after urination, often at night, in the morning or when waking up from nap to urinate, mostly without prodromal symptoms and sudden syncope, the recovery period symptoms are light. After drinking alcohol, cold weather, and fatigue are possible triggers. In addition to the dysfunction of the reflex arc that regulates blood pressure and heart rate, it is also associated with the increase in intrathoracic pressure due to breath-holding during urination, the lack of blood supply to the brain due to getting up after a long sleep, and the high vagal tone and low blood pressure at night, etc. Some people classify it as multifactorial syncope. Defecation syncope is rare, and its mechanism is similar to that of urinary syncope. 2, cough syncope (tussive syncope): loss of consciousness immediately after violent coughing, hypotonia, briefly. Few patients first feel dizzy and dizzy, and their faces change from blue to pale and sweating. Patients are mostly obese men after middle age, frequent smokers with bronchitis and emphysema, and children with pertussis or asthma. Most of them follow repeated coughing, and occasionally fainting is seen immediately after a single cough, call, sneeze, yawn, or laughing. Coughing increases intrathoracic pressure, resulting in obstruction of venous return and cardiovascular reflex factors play a role in the onset of the disease. Swallowing syncope: It occurs in patients with pharyngeal, laryngeal, esophageal, or mediastinal diseases and/or atrioventricular block, sinus syndrome, bradycardia, or myocardial infarction after swallowing cold, hard, sour, or spicy foods or gas-producing beverages, with no obvious discomfort before or after the attack, and is not related to body position. The pathogenesis is related to mechanical stimulation of the upper gastrointestinal tract, abnormal afferent impulses triggering reflex cardiovascular inhibition, and abnormal sensitivity of the cardiac conduction system to vagal excitation.