Stroke usually refers to stroke, including hemorrhagic stroke and ischemic stroke. The most common hemorrhagic stroke in China is hypertensive cerebral hemorrhage, and the most common ischemic stroke is acute cerebral infarction. Cerebral hemorrhage and cerebral infarction need head imaging to identify them. The symptoms and first aid measures for both are as follows: 1. Cerebral hemorrhage: Most patients over 50 years old with hypertension have sudden onset. The most common clinical symptoms are headache, dizziness, nausea and vomiting, impaired consciousness, increased blood pressure, and may be accompanied by coffee-like vomitus. First aid treatment requires keeping the patient’s airway open, tilting the head to the side or lying on the side for oxygen, timely removal of oral and respiratory secretions, and if necessary, tracheotomy for mechanical ventilation. Control of blood pressure and cranial pressure is the key to the treatment of hypertensive cerebral hemorrhage, mostly using antihypertensive drugs and mannitol drip, if necessary, craniotomy is needed to remove the hematoma; 2. cerebral infarction: mostly seen in middle-aged and elderly people over 50, patients can have prodromal symptoms such as dizziness, limb numbness, weakness, etc. The onset is slow, often occurring during sleep or quiet rest, gradually worsening within a few hours, mostly peaking within 1-2 days. Clinical symptoms of cerebral infarction are also related to the site of arterial vascular occlusion, the most common being middle cerebral artery occlusion, which usually results in hemiparesis, hemianesthesia and hemianopsia on the contralateral side of the lesion. In the case of vertebrobasilar artery occlusion, patients may experience vertigo, nausea, vomiting, dysphagia, diplopia, visual impairment, dysarthria, and in a few patients, sudden coma and quadriplegia may occur and death may occur within 2-4 days. If a patient develops cerebral infarction, the patient should be sent to the hospital immediately for thrombolytic therapy. Arterial thrombolysis and intra-arterial intervention are the main means of treating acute cerebral infarction.