1.General symptoms: pulsating headache, located on the sick side, may be accompanied by intracranial vascular murmur. 2.Hemorrhage: often the first symptom, manifested as subarachnoid hemorrhage or intracerebral hematoma. 3, epilepsy: can be the first symptom or seen after hemorrhage, mostly generalized seizures or limited seizures, and limited seizures have localization. 4, focal symptoms: those with supratentorial lesions may have mental abnormalities, hemiparesis, aphasia, dyslexia, miscalculation, etc. For those with sub-screen lesions, vertigo, diplopia, ophthalmoplegia and gait instability are more common. 5, the disease childhood in the appearance of some basic symptoms can be seen: some people at the age of 3, 5 years old show that they can not walk a long way, walking about 0.5 kilometers children appear weak, need to rest in place; reading, in the front stage of brain development, especially smart, good grades, in the brain needs a lot of blood supply stage, because of insufficient blood supply, the brain can not develop normally, so students with this disease, generally Students with this disease usually start to have lower grades when they enter junior high school. The most important characteristic of the disease is that there are no clearly perceivable symptoms and the disease is not known until after the onset of the disease, but it is too late and the best time for treatment is missed. It is recommended that children with both of these characteristics be diagnosed with a brain imaging procedure at the hospital.