Vasoconstriction is the narrowing of a blood vessel due to the contraction of a surrounding muscle. It is a normal physiological response to bleeding, cold, or suddently sitting up. It is also either the therapeutic or a side effect of many pharmaceuticals including antihistaminesdecongestants and stimulants. In most cases, vasoconstriction will raise local blood pressure in the affected area.

Vasoconstriction at Wikipedia

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.