According to the different causes of abnormal blood supply to the brain, stroke is divided into two main types:

1. Ischemic Stroke (such as cerebral thrombosis, cerebral embolism) – mainly caused by fat accumulation inside blood vessels. Fat deposits can easily form blood clots, leading to vascular narrowing or blockage, which damages brain cells. Blood clots can form inside the brain or originate from other parts of the body. Clots outside the brain usually come from the neck or the heart. When an irregular heartbeat, such as atrial fibrillation, occurs, it increases the risk of clot formation.

2. Hemorrhagic Stroke (such as cerebral hemorrhage, subarachnoid hemorrhage) – caused by blood vessel rupture and bleeding, where the hematoma and edema compress brain tissue, leading to a series of clinical symptoms.