What is vascular dilation?

Relaxed blood vessel. Blood vessels are not pipes. They have muscles in the walls and are capable of expanding and contracting to maintain your blood pressure and volume. Vascular dilation or vasodilation refers to the state when blood vessels are relaxed and expanded such as when you drink alcohol or put a hot pack on your skin. Vasoconstriction is the opposite.
Dilatation. of arteries and vein Meaning increase in diameter This typically occurs in response to exercise or various hormones or medications.