Stroke is a neurological deficit syndrome caused by a localized blood circulation disorder in the brain, usually with an acute onset and lasting for a few minutes, hours or even more than a day. What types of strokes are there? Strokes are usually divided into two categories: ischemic strokes and hemorrhagic strokes. Overall, 87% of strokes are ischemic strokes and 13% are hemorrhagic strokes. Ischemic strokes mainly include transient ischemic attack and cerebral infarction. Transient ischemic attack, also called transient ischemic attack, or TIA for short, is a neurological disorder caused by transient, ischemic, focal damage to brain tissue. 2, cerebral infarction, which is further divided into two categories, including cerebral thrombosis and cerebral embolism. (1) Cerebral thrombosis: it is mostly caused by atherosclerosis, various arteritis, trauma, blood disorders that cause the blockage of blood clots formed by local lesions of cerebral vessels. (2) Cerebral embolism: it can be induced by the emboli produced by various diseases entering the blood and blocking the blood vessels in the brain. Clinically, heart disease is the most common cause; followed by fat entering the blood after fracture or trauma; sometimes worm eggs or bacterial infection into the blood; pneumothorax and other causes of air into the blood, phlebitis formation of emboli and other factors, embolism caused by the cerebral vessels. The classification of ischemic stroke is complicated, but simply put, if the cerebral blood flow is not usual for a long time due to various reasons, the brain nerves are necrotic and it is difficult to recover from the disease, it is cerebral infarction; if the cerebral blood flow is not smooth for a short time, the brain nerves are not necrotic and the disease is recovered, it is a transient ischemic attack. Hemorrhagic stroke is well understood, it is a rupture of a blood vessel in the brain and blood flows into or around the brain tissue. It can be divided into cerebral hemorrhage and subarachnoid hemorrhage. Patients with hemorrhagic stroke are more severely ill, and many are at risk of ineffective treatment and eventual death.