Recently, an employee of a group company, who had been repeatedly treated in many hospitals for tinnitus and headache, developed into a protruding eye, and was advised to check CTA (cervicocerebral angiography) by the Interventional Department of the North Hospital of the General Hospital of the group company. The patient was treated with interventional embolization, and now he has recovered and returned to work. Carotid cavernous sinus fistula (CCF) refers to the rupture of the internal carotid artery itself or its branches in the cavernous sinus segment of the skull, forming an abnormal arterial and venous communication with the cavernous sinus, resulting in a series of clinical manifestations due to increased pressure in the cavernous sinus. The cavernous sinus is the only structure in the body where arteries pass through veins, and because of the high incidence of craniocerebral trauma, the cavernous sinus area is highly susceptible to arteriovenous fistulas, of which TCCF accounts for over 70%. Since the first report of successful treatment of TCCF with detachable balloon embolization in 1974, with the rapid development of medical imaging and continuous improvement of embolization materials, as well as the continuous improvement of embolization techniques over the past 30 years, endovascular treatment has become the preferred method of treatment for CCF. Similar to the pathogenesis of internal carotid cavernous sinus fistula (CCF), dural arteriovenous fistula is an abnormal traffic between the dural sinuses such as cavernous sinus, lateral sinus, sagittal sinus and other nearby arteries and veins, which is the communication between the extracranial blood supply arteries and intracranial venous sinuses. Advances in endovascular embolization therapy have provided the possibility of anatomical cure for the disease, and interventional endovascular embolization has become the treatment of choice for both of these diseases. The method involves delivering a specially designed microcatheter to the fistula under interventional fluoroscopy through a venous or arterial approach, and then occluding the fistula or embolizing the main trunk of the blood supplying artery by placing embolic materials such as balloons, spring coils, and biologics through the microcatheter to cure the disease.