The symptoms of dural arteriovenous fistula are as follows: 1, most patients occasionally have mild tinnitus or murmurs, mainly murmurs from arteriovenous fistula blood flow, and even individual patients have no symptoms at all, and only occasionally do CT examinations after physical examinations or minor head injuries to find abnormalities, and then further examinations, such as CTA, which is CT angiography, or DSA cerebral angiography, to further clarify that it is a dural Some patients with dural arteriovenous fistula may have systemic or focal neurological dysfunction due to hemorrhage as well as cerebral edema, headache, nausea, vomiting symptoms after hemorrhage, and seizure symptoms such as facial palsy, aphasia, unstable walking and other neurological dysfunctions, patients with larger hemorrhage or patients with more urgent hemorrhage may have rapid deterioration of sanity, sudden Patients with large bleeding volume or more urgent bleeding volume may experience rapid deterioration of mental ability, sudden onset of mental coma, and failure to respond to calls, which require prompt hospital consultation.