Raynaud phenomenon.
Raynaud phenomenon, a vascular disorder triggered by cold or emotional stress, results from an exaggerated vasoconstriction and vasospasm of the digital arteries and arterioles. The fingers, and, less often, the toes, are affected; ear lobes, lips, nose, and nipples may also be involved. This article describes the difference between primary and secondary Raynaud phenomenon and reviews etiology, diagnosis, prevention, and management of symptoms.
Adolescent↗