Generally speaking, once in a while low blood pressure is not prone to vascular dementia, but if low blood pressure is relatively longer or the degree of low blood pressure is more serious, it will cause vascular dementia. Low blood pressure will cause vascular dementia is due to low blood pressure makes the intracranial blood supply for a long time is seriously insufficient, and the brain cells are ischemic and necrotic caused by. If the hypotension is once in a while and does not last long, although there is insufficient blood supply in the skull, it can be recovered within a short period of time and will not affect the brain cells, so there will not be vascular dementia. Low blood pressure lasts for a long time or although not long, but the blood pressure is very low can also make the intracranial blood supply is seriously insufficient, brain cell necrosis appear vascular dementia. If you have low blood pressure, you must go to the hospital in time to find out the cause of the problem and take active treatment to avoid vascular dementia and other diseases caused by low blood pressure.