Stroke, also known as stroke, is an acute cerebrovascular disease caused by the sudden rupture of blood vessels in the brain, or the inability of blood to flow to the brain due to blockage of blood vessels, resulting in brain tissue damage, including both ischemic and hemorrhagic types. Most patients have no precursory symptoms before the onset of stroke. A small number of patients may have the following symptoms: i. Common symptoms of whole brain injury: for example, headache, nausea, vomiting, dizziness, and in severe cases, confusion or even coma. Second, the common symptoms of local brain injury: 1, hemiplegia: the patient has no strength in one limb, sometimes can be manifested as a sudden fall; 2, hemiplegia: the patient’s side of the face or limbs suddenly numb; 3, hemianopia: the patient’s side of the visual field is missing; 4, aphasia: the patient suddenly can not speak, or do not understand what others and their own words, do not understand, and can not write the words previously read and written; 5, vertigo: the patient to see The patient can see things spinning, sometimes with nausea and vomiting; 6. diplopia: seeing things in pairs; 7. dysphonia: unable to pronounce words, sometimes swallowing difficulties, choking and coughing; 8. ataxia: walking unsteadily, wavering, uncoordinated movements.