Raynaud syndrome

[Marquetta]

Raynaud syndrome, a functional peripheral arterial disease, is a condition in which small arteries (arterioles), usually in the fingers or toes, narrow (constrict) more tightly than normal in response to exposure to cold.

Constriction of small arteries causes fingers (or toes) to become pale or bluish, numb, and tingle.
Doctors can often make a diagnosis on the basis of the person’s symptoms.
Keeping warm, avoiding smoking, and sometimes taking drugs may help.

Raynaud syndrome may be

Primary, meaning no cause is apparent (also called Raynaud disease)
Secondary, meaning a cause can be identified (also called Raynaud phenomenon)

Doctors use the term Raynaud syndrome to refer to either.