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, why do patients suffer from syncope caused by glossopharyngeal neuralgia or other visceral diseases? The following is a brief description: I. The classification of the etiology of syncope is not uniform. Generally, syncope is divided into different types according to the etiology. These include: 1, vasodilatory syncope; 2, cardiogenic syncope; 3, cerebral syncope; 4, pharmacogenic syncope; 5, metabolic syncope; 6, syncope caused by psychological factors; 7, others. Second, there are also scholars simply summarized as: cardiogenic syncope, non-cardiogenic syncope and unexplained syncope. According to domestic Lu Liang, syncope can be divided into 4 major categories according to the etiology: 1, hypotensive syncope; 2, cardiogenic syncope; 3, cerebrovascular syncope; 4, multifactorial and other types of syncope. Third, domestic Tang Qizhu and others believe that cerebral syncope actually refers to cerebrovascular syncope, which can be classified into the same type with other vascular diseases such as hypertension and aortitis. Therefore, the authors believe that syncope can be divided into the following 4 categories: 1. vasomotor dysregulation syncope; 2. cardiogenic syncope; 3. vasculopathic syncope; 4. others.