So who is prone to strokes in the summer? There are two types of strokes that we often refer to, namely ischemic stroke (cerebral infarction) and hemorrhagic stroke (cerebral hemorrhage). The former in particular is more common, accounting for basically more than 80% of strokes. The incidence of cerebral infarction in summer is higher than when the climate is calm, mainly for several reasons: 1, hot and muggy weather, the temperature is high to 35 degrees, the body in order to dissipate heat, the whole body skin vascular expansion, a large amount of blood circulation to the body surface, while the evaporation of water from the skin heat, will lead to important internal organs, especially cerebral vessels in a relative ischemic state, prone to cerebral infarction. 2, if sweating more, insufficient hydration, systemic blood concentration, blood viscosity increases, is also another important cause of acute ischemic stroke. 3, summer skin vasodilation, sweating, blood pressure is often lower than usual, so patients who usually do not have high blood pressure are prone to ischemic cerebral infarction in the summer. 4, the elderly body functions slowly degenerate, the regulation of hot and cold temperature response is not sensitive, if frequent changes in the hot outdoor and air-conditioned indoor conversion, the chances of a stroke also greatly increased. The aforementioned Xu Da Ma is a victim of sudden changes in heat and cold. The woman was already sweating in the direct sunlight walking on the street at noon in the sweltering heat, and once she entered the air-conditioned supermarket room, she was suddenly cold and hot, and suffered an acute ischemic stroke due to uncontrolled regulation. How to prevent the occurrence of stroke in summer? The above reasons, summer stroke is mainly related to hot weather, sweating, drinking less water, low blood pressure, thick blood and other factors. Then for the elderly, especially those with cardiovascular risk factors, the following points can be done to effectively reduce or mitigate the occurrence of stroke in summer. 1, less sweating. Adjust the room temperature, air pressure and humidity, often open the window ventilation, so as to avoid the room too hot. The difference between indoor and outdoor temperatures should not exceed 8 degrees. Excessive temperature difference is not easy to adjust to the elderly. The indoor temperature should be 25~27 degrees, not too high or too low. 2. Drink more water. Especially at night. It is recommended that the elderly always have a bottle of plain water at their bedside, and drink two sips at any time when they get up at night, which is helpful for improving blood viscosity. Under normal conditions, blood pressure is low at night, blood circulation is slowed down, if this is the blood concentration viscous, very easy to get up in the morning when the brain infarction. 3, the summer elderly as far as possible in the cool indoor activities, outside activities must avoid direct sunlight high temperature. Also avoid overexertion. In the morning and evening when it’s cool, do a small amount of relatively gentle exercise such as scattering, playing Tai Chi, etc. 4, to understand their blood pressure and cerebrovascular situation, if the summer blood pressure is low or cerebrovascular stenosis is heavy, then appropriate to stop or reduce the dosage of antihypertensive drugs. For cerebrovascular examination, cervical vascular ultrasound, spiral CT cerebral angiography (CTA) or cranial magnetic cerebral angiography (MRA) are recommended.