Internal carotid artery cavernous sinus fistula refers to the rupture of the internal carotid artery or its branch arteries in the cavernous sinus segment, forming an abnormal arteriovenous traffic with the cavernous sinus, which may lead to increased pressure in the cavernous sinus, and the common clinical symptoms include tortuous and angry ophthalmic veins, protruding ocular pulsations, and intracranial murmur. Internal carotid cavernous sinus fistula can be detected and diagnosed by cerebral angiography, complications include cerebral nerve paralysis, pseudoaneurysm, etc., if not treated in time, it may cause vision loss, in severe cases, there is the possibility of blindness, and there is a certain chance of causing nasal or intracranial hemorrhage, which is life-threatening in severe cases. The internal carotid artery cavernous sinus fistula treatment is generally taken by surgical methods to plug the fistula, at the same time the patient should pay attention to a light diet, eat less spicy and stimulating food, keep the bowel movement.