Many people mistakenly believe that the cold season is the high incidence of strokes in the elderly, and that strokes do not usually occur in the summer. In fact, it is not, hot weather is also prone to stroke. Studies have shown that when the temperature rises above 32°C, the incidence of stroke is 66% higher than usual, and the risk increases as the temperature rises. Now is the summer heat season, the body sweats more easily lead to a lack of water in the body, and the elderly body water is relatively small, the body is more likely to be trapped in a dehydrated state. The lack of water in the body will make the blood sticky, which will slow down the flow of blood to the brain and increase the chance of stroke, especially for the elderly who suffer from hypertension, hyperlipidemia, diabetes and other underlying diseases. In order to increase heat dissipation, the blood vessels on the surface and periphery of the body expand, making our blood pressure lower than in other seasons. If there is a lack of effective monitoring of blood pressure at this time and antihypertensive drugs are not adjusted in a timely manner, continuing to take antihypertensive drugs in the original dose may lead to low blood pressure and brain infarction. At the same time, some people, due to the heat of the day, often take the cool until late at night, until the body is very tired before going to bed, resulting in the second half of the night sleep very deep, when the blood pressure will fall very low, the blood flow rate is also particularly slow; in addition, the summer after eating unclean food often leads to diarrhea, severe diarrhea often leads to dehydration or even shock, the effective blood volume is insufficient, intracranial perfusion decreased, the elderly already suffer from cerebral vascular stenosis, the blood supply to the brain tissues on the blood pressure of the brain is very low. The blood supply to the brain tissue is also more sensitive to changes in blood pressure. All of the above may cause the various components of the blood to clot more easily to form thrombus or to reduce blood supply to the tissues without forming thrombus, leading to cerebral infarction. We know that most cerebral hemorrhages are caused by high blood pressure, which causes damage to small blood vessels and creates tiny aneurysms that can easily rupture when blood pressure fluctuates sharply, causing cerebral hemorrhage. Although it is generally believed that people’s blood pressure generally tends to decrease during the summer, this is not absolutely the case. Studies have shown that blood pressure does not respond exactly to the seasons in different age groups, for example, blood pressure in some age groups may also increase during the summer. Summer is also a season that is prone to mood changes, or what is often referred to as emotional heat stroke. Blood pressure varies with mood swings, and it is common to see or hear of cases of brain hemorrhage caused by emotional stress in daily life. For example, in our Changsha area this year, the first day was a hot sunny day, but the next day was some cool breeze, the temperature change of more than 10 degrees, it is difficult to adapt to, individuals sensitive to sudden changes in temperature should pay special attention to changes in blood pressure, to avoid a sudden drop in temperature caused by a steep rise in blood pressure, inducing brain hemorrhage. To prevent stroke in summer, we must prevent the above causes. First, we should strictly control various basic diseases, especially hypertension, diabetes, hyperlipidemia and heart disease, etc. We should diligently monitor blood pressure and blood glucose and adjust medications to avoid large fluctuations in blood pressure and too high or too low blood glucose; second, we should avoid various cases of water loss, such as heavy sweating, diarrhea, and timely hydration when necessary; third, we should develop a good life, including sleep habits, and maintain adequate physical strength. Controlling high blood pressure is the most effective means to prevent cerebral hemorrhage; to prevent cerebral hemorrhage, you should firmly control high blood pressure. If you already know you have hypertension, you should take the initiative to cooperate with your doctor, take your medication on time, and control your blood pressure effectively in as short a time as possible. Patients with hypertension are often irritable and have difficulty controlling their emotions. In addition to actively controlling blood pressure, attention should be paid to improving the working environment and interpersonal relationships, removing bad habits such as smoking and drinking, and family members should actively cooperate with patients to maintain a good family atmosphere.