Patients with cerebrovascular malformations do not have symptoms in the early stages, or the symptoms are very insidious. After a certain age, cerebrovascular malformations rupture and bleed, or seizures occur, causing serious symptoms that lead to the patient seeking medical attention and being diagnosed. So although most cerebrovascular malformations are congenital, those with obvious symptoms tend to be concentrated in the 20-40 age group. So what are the typical symptoms of cerebrovascular malformations? What symptoms should be alerted? 1, headache According to the size and location of cerebrovascular malformation, not everyone has headache symptoms, even if the headache symptoms are not the same. But there are common points. First, the headache site is often fixed. Second, the headache tends to be a vague dull pain, and the symptoms are especially prominent in patients with a small amount of localized bleeding or oozing blood. This needs to be identified with migraine. 2, blood-stealing symptoms are mostly seen in patients with large cerebrovascular malformations and fast blood flow in the malformed mass. Vascular malformation is located in the part of the blood flow from the arterial inflow, rapid through the vascular malformation mass, by the venous drainage out. Comparatively speaking, the brain tissue around the cerebrovascular malformation is unable to obtain sufficient nutrients, which is known as “blood theft”. As a result, localized brain softening, necrosis, and even dysfunction may occur. Different parts of the malformation are located in different parts of the brain, and the symptoms are often different, which can be manifested as mental retardation, loss of limb muscle strength and so on. 3, epilepsy Cerebrovascular malformations often cause local neuronal degeneration and necrosis, and in severe cases, desheathing, softening, microcysts, cysts, and even cyst formation can be seen; there can be ferritin deposition, histiocyte reaction, amyloid vesicles, calcification, and gliosis, etc., and some of the local brain tissues are obviously atrophic. Even small arteriovenous malformations can occur. These pathologic changes are highly susceptible to seizures, i.e., “epilepsy”. The performance of epilepsy is various, can be “frozen”, can also be foaming at the mouth, “crooked mouth and eyes”, limb “cramps” and so on. 4, vascular malformation rupture hemorrhage caused by brain pressure, stimulation symptoms A considerable part of the patients because of vascular malformation rupture hemorrhage triggered by a series of symptoms before being found. It is manifested as subarachnoid hemorrhage or intracerebral hematoma. Severe headache, nausea, vomiting, mental abnormality, hemiparesis, aphasia, dyslexia, dyscalculia, etc., as well as vertigo, diplopia, eye tremor and unsteady gait can also occur. To summarize, with the above symptoms, there is a possibility of cerebrovascular malformation, and should be promptly consulted for examination.