What Are the Signs of Lupus?
2. Discolored Extremities
Fingers and toes of people who suffer from lupus can periodically turn white, blue, or purple. This disturbing condition is known as Raynaud’s phenomenon and usually occurs in response to cold weather or emotional stress. It also can be triggered by certain decongestant medications, exposure to cigarette smoke, or by holding electronic devices that vibrate, such as electric drills or hand mixers.
Physiologically, the discoloration is caused by an inflammatory narrowing of small vessels that supply blood to the skin. There is often a numb or pins-and-needles sensation accompanying it, and some report the experience as being painful. Other extremities like the nose, ears, or chin also can be affected. When the skin is warmed or the external trigger removed, affected areas can turn red in response to restored blood flow and increased temperature.
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