What Is Raynaud's Phenomenon?
Raynaud's phenomenon is a condition that affects the blood vessels in the fingers, toes, ears, and nose. The most common form of Raynaud's phenomenon,
Raynaud's disease, is characterized by episodic attacks, called vasospastic attacks, that cause the blood vessels in the digits (fingers and toes) to constrict (narrow). Raynaud's phenomenon can occur on its own, or it can be secondary to another condition, such as
scleroderma or lupus.
Although estimates vary, recent surveys show that Raynaud's phenomenon may affect 5 to 10 percent of the general population in the United States. Women are more likely than men to have the disorder. Raynaud's phenomenon appears to be more common in people who live in colder climates. However, people with Raynaud's who live in milder climates may have more attacks during periods of colder weather.
Different Types of Raynaud's Phenomenon
Doctors classify Raynaud's phenomenon as either:
- Primary Raynaud's phenomenon
- Secondary Raynaud's phenomenon.
In medical literature, "primary Raynaud's phenomenon" may also be called Raynaud's disease, idiopathic Raynaud's phenomenon, or primary Raynaud's syndrome. The terms "idiopathic" and "primary" both mean that the cause is unknown.
Most people who have Raynaud's phenomenon have the primary form (the milder version).
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