noun
the constriction of blood vessels, which increases blood pressure
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Vasoconstriction is the narrowing of blood vessels, which can lead to increased blood pressure.
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When you're cold, vasoconstriction occurs to help conserve heat in your body.
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I hate when vasoconstriction happens because my hands get all tingly and numb.
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Emotional stress can cause vasoconstriction in your blood vessels, making you feel tense and anxious.