Cold temperatures make the blood vessels constrict, which increases the pressure in the arteries. When blood pressure rises, the risk of a blood vessel bursting or a clot forming becomes higher, making winter an especially sensitive time for those with hypertension, or high blood pressure levels. Also, in cold months, your body loses moisture faster, as dehydration also takes place, making the blood thicker, which flows very slowly in the arteries. According to experts, these blood vessels supply blood to the brain.
Cold Wave Triggers Sharp Rise in Brain Stroke Cases, Doctors Warn
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