Cerebrovascular malformation is a congenital condition, which means that it occurs in the mother’s womb. Is it true that children and even young children are the most common group of people with cerebrovascular malformations? In fact, it is not the case. Most of the people who are diagnosed with cerebrovascular malformation are those who have obvious symptoms, and this is mostly in young people aged 20-40. Why? It turns out that these patients with cerebrovascular malformations do not have any symptoms in the early stage, or the symptoms are very insidious and easy to be ignored. After a certain age, the cerebrovascular malformations rupture and bleed or seizures occur and cause serious symptoms, leading patients to go to the doctor and be diagnosed. So, what are the typical symptoms of cerebrovascular malformation? 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 do not appear the same. However, 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 particularly prominent in patients with a small amount of localized bleeding or oozing blood. This needs to be differentiated from migraine. 2. Blood-stealing symptoms are mostly seen in patients with large cerebrovascular malformations and fast blood flow within the malformed mass. The blood flow in the area where the vascular malformation is located flows from the artery, rapidly through the vascular malformation mass, and is drained out by the vein. In contrast, the brain tissue around the cerebrovascular malformation does not receive enough nutrients, which is called “blood theft”. This results in localized brain softening, necrosis, and even dysfunction. The symptoms are often different depending on the location of the malformation, and can be manifested as mental retardation, loss of limb strength, etc. 3, epileptic cerebrovascular malformations often cause local neuronal degeneration, necrosis, heavy sheathing, softening, microcysts, microcysts, and even cyst formation; there can be iron-containing heme deposits, tissue cell reaction, amyloid vesicles, calcification and glial cell hyperplasia, etc., and some local brain tissue shows obvious atrophy, etc. Even small arteriovenous malformations can occur. These pathological changes can easily induce seizures, or “epilepsy”. The manifestations of epilepsy are diverse and can be “frothing at the mouth”, “slanting of the mouth and eyes”, and “cramping” of the limbs. 4.Brain pressure and irritation symptoms caused by rupture and bleeding of vascular malformation A considerable number of patients are found because of a series of symptoms caused by rupture and bleeding of vascular malformation. This is manifested as subarachnoid hemorrhage or intracerebral hematoma. Severe headache, nausea, vomiting, mental abnormalities, hemiparesis, aphasia, dyslexia and dyscalculia may occur, as well as vertigo, diplopia, eye tremor and gait instability.