Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Vasodilation
Medically reviewed by Min Clinic Staff | Updated: January 2026
Vasodilation: Widening of blood vessels that results from relaxation of the muscular walls of the vessels. What widens in vasodilation is actually
the diameter of the interior (lumen) of the vessel. The opposite of vasodilation is vasoconstriction.