Raynaud’s phenomenon, also known as Raynaud’s disease or Raynaud’s syndrome, is a condition that affects blood flow to certain parts of the body—usually the fingers and toes. It is named after the French doctor Maurice Raynaud, who first described it in the 19th century.

People with Raynaud’s experience episodes where blood vessels in their extremities (like fingers and toes) narrow in response to cold or stress, limiting blood supply to these areas. This leads to color changes in the skin, typically turning pale or white, then blue, and eventually red as blood flow returns. The affected areas may also feel cold or numb during an episode, and some people feel mild pain.

Raynaud’s phenomenon can occur on its own or be associated with other conditions like scleroderma or lupus. It’s important for individuals with symptoms of Raynaud’s to consult with a healthcare professional for proper diagnosis and management. Keeping warm and managing stress are often recommended lifestyle measures for those with Raynaud’s.