Vasoconstriction is the process of constriction of blood vessels, which may result in decrease of flow of blood. Normal blood flow is necessary for carrying oxygenated blood to all parts of the body and when the normal flow is disrupted it may cause various problems. Vasoconstriction can occur due to medical condition or due to psychological disorder.
This condition happens when the small muscles of the walls constrict causing narrowing of blood vessels. Actually this process is exactly opposite condition of vaso-dilation in which the blood vessels enlarge or open widely. The contraction of blood vessels can increase the heat of the body and may cause vascular conflict. Following this condition, the skin becomes paler than before since blood supply is drastically reduced.
It occurs mostly on large arteries thus obstructing the blood flow but sometimes it can develop on small arterioles causing constriction of blood vessels.
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