An idiopathic vascular disorder characterized by bilateral Raynaud phenomenon, the abrupt onset of digital paleness or CYANOSIS in response to cold exposure or stress.

(raynaud's disease) Intermittent attacks of ischemia in the fingers, toes, ears, or nose, accompanied by pain, pallor, and prickling; phenomenon applies to secondary symptoms, disease when cause is unknown.

(raynaud phenomenon) Raynaud phenomenon is a condition that affects your blood vessels (the tubes that your blood flows through). It causes your blood vessels to narrow, which decreases blood flow. This is called a Raynaud episode or "attack." The attacks usually affect your fingers and toes, causing them to become cold and numb. They may also change color, usually to white or blue. These attacks happen in response to cold temperatures or stress. Raynaud phenomenon may also be called Raynaud disease or Raynaud syndrome.

Raynaud's (ray-NOHZ) disease causes some areas of your body - such as your fingers and toes - to feel numb and cold in response to cold temperatures or stress. In Raynaud's disease, smaller arteries that supply blood to your skin narrow, limiting blood circulation to affected areas (vasospasm).