High summer temperatures, sweating, such as drinking less water, blood volume is often insufficient, blood viscosity increases, coupled with the heat and rest is not good, the elderly, especially those who have cerebrovascular disease is very vulnerable to ischemic stroke. Special attention should be paid to prevention. First, patients who have had an ischemic stroke (cerebral infarction, transient ischemic attack) should take aspirin enteral tablets orally for life according to the secondary prevention standard. Secondly, patients at high risk of stroke are advised to have regular medical check-ups at hospitals, have a physical examination such as neck vascular ultrasound every six months, and usually pay attention to blood pressure testing to detect abnormalities and seek timely medical attention. Third, when the temperature exceeds 32 degrees Celsius, the body sweats a lot, which easily leads to blood concentration and increased blood viscosity, so it is important to drink more water in summer to prevent ischemic damage to vital organs. Fourth, the elderly should ensure sufficient sleep and try not to stay up late. Fifth, maintain a balanced and optimistic state of mind and a relaxed mood. Sixth, the elderly should exercise properly. Seventh, pay attention to a reasonable and balanced diet, limit the intake of fat and cholesterol, eat more vegetables and fruits and foods containing more dietary fiber, do not eat raw and cold foods, do not eat too many cold drinks. Eighth, to quit smoking, limit alcohol, especially in the summer heat, do not smoke when riding in the cool, do not drink too much wine, and do not drink cold beer for a moment of pleasure. Autumn, winter and summer are the most common seasons for stroke. If you get a stroke, the earlier the patient is treated, the better, preferably within 3 hours of the onset of the stroke. The early symptoms of stroke are obvious and usually have six major symptoms: First, sudden blackness or blurred vision in one or both eyes. Second, sudden double vision or vertigo. Third, sudden numbness (wood) in one side of the hand, foot or face or with weakness of limbs. Fourth, sudden speech with dumb tongue and unclear speech. Fifth, sudden vertigo, or nausea and vomiting, or even panic and sweating. Sixth, without any premonition, sudden fall, or with short time confusion. If one or more of the above six symptoms appear, you should be highly alert and go to hospital for treatment in time.