What is Renaud's syndrome?

Raynaud's syndrome, also known as Raynaud's phenomenon, is a condition characterized by episodic narrowing of the blood vessels, typically in the fingers and toes, in response to cold temperatures or stress. This results in discoloration, usually turning pale or blue, and can lead to numbness or tingling. In some cases, it may be associated with underlying autoimmune disorders, but it can also occur on its own as a primary condition. Management often includes lifestyle changes to avoid triggers and, in some cases, medication to improve blood flow.