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Raynaud's is a condition that may cause some areas of your body to feel numb and cool in response to cold temperatures or stress. The condition causes occasional narrowing of blood vessels, limiting blood flow for brief periods of time. This is called a vasospasm. During periods of vasospasm, the skin is deprived of oxygen, and may become pale and then turn a bluish color. As the blood vessels relax and blood flow resumes, the skin may become red. The hands and feet are most commonly affected, but Raynaud's may also involve the nose, lips, cheeks, and earlobes.
For most people, cold temperature or stress triggers an attack. Typically, when the body is exposed to cold, the hands and feet lose heat rapidly. In order to conserve heat, the body reduces blood flow near the skin surface and moves it deeper into the body. For people with Raynaud's, this normal response is exaggerated by sudden spasms of the small blood vessels that supply blood to the fingers and toes. This greatly reduces the blood supply to the hands and feet, causing changes in the skin color and temperature.
The first sign is often pallor (or whiteness), in response to the spasm. The skin may then appear blue (cyanotic) and feel numb or cold, because of a lack of oxygen-rich blood. Finally, the skin may turn red and become swollen, as the small blood vessels relax and dilate, and blood flow returns. Commonly, throbbing and tingling may occur in the fingers and toes as the attack ends. Raynaud's attacks can last from seconds to hours. Children's cancer survivors who received treatment with vinblastine or vincristine sometimes develop Raynaud's.
Raynaud's is usually a chronic condition that needs lifelong management. Some people may see improvement slowly over several years. Prevention of attacks is key:
Treatment for Raynaud's is directed at reducing the number and severity of attacks in order to prevent tissue damage. People with Raynaud's should follow all of the above recommendations for preventing attacks. In addition, if attacks are triggered by exposure to cold, placing the affected body part in warm water may help to stop symptoms. Other treatment methods include medications and biofeedback.
Medications that help to dilate blood vessels and promote circulation are sometimes prescribed for management of severe symptoms. Certain prescription medications can sometimes make symptoms worse. These include birth control pills and some heart and blood pressure medicines. If you are taking any of these medications and are having symptoms of Raynaud's, consult with your healthcare provider regarding possible alternatives. Certain over-the-counter cold or diet pills that contain pseudoephedrine (such as Actifed, Chlor-Trimeton, and Sudafed) also can make symptoms worse and should be avoided.
Using your mind to control stress and body temperature may help to decrease the severity and frequency of attacks. This may include guided imagery and/or deep breathing exercises. A psychologist may be helpful in designing a biofeedback program that meets your needs.