People who do not have high blood pressure can also suffer from stroke disease for the following reasons: 1, on the basis of the original pathology, patients with transient hypertension caused by cerebral hemorrhage, and then a stroke; 2, patients with atherosclerosis because of the increasing degree of cerebrovascular atherosclerosis, making the internal diameter of the artery more and more narrow, to a certain extent, regardless of blood pressure, can occur cerebral infarction, and then a stroke; 3, atrial fibrillation, blood diseases, malignant tumors and other diseases themselves can cause cerebrovascular disease, resulting in stroke; 4, other causes: intracranial injury, intracranial surgery, trauma, poisoning, hypoxia, etc. can also lead to stroke.