Reviewed by Dr. Michael Kessler, DC— Raynaud’s phenomenon, also called Raynaud’s syndrome or Raynaud’s disease, is a condition affecting the circulatory system. People with Raynaud’s experience restricted or interrupted blood flow, known as vasospasms, to the fingers, toes, ears, nose, or nipples.

Raynaud’s disease can be a symptom of various underlying medical conditions. In such cases, it is called secondary Raynaud’s.

Otherwise healthy people can also experience Raynaud’s syndrome. This form is called primary Raynaud’s, and while it is more common, doctors aren’t entirely sure of its cause. Stress and cooler temperatures have been

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