Why does it feel difficult to breathe when the weather is cold and hot, and sometimes it will be dizzy?

The accumulation of cold and heat can easily lead to cerebral vasospasm. Because blood vessels will expand when the temperature is high, if the body temperature drops rapidly at this time, blood vessels will easily spasm when they are hot and cold, resulting in insufficient blood supply to the brain and intracranial hemorrhage.

Especially in summer, high temperature makes you sweat more, and if you don't replenish water in time, your blood volume will decrease, which will accelerate vasospasm.

Therefore, to prevent cerebral vasospasm, we should pay attention to supplementing water, combining work and rest, balancing diet, and quitting smoking and drinking.