Raynaud’s disease, or Raynaud’s phenomenon, causes extremities like
fingers and toes to change color (white or red) in response to cold,
stress, or anxiety due to reduced blood flow. Symptoms include numbness
, pins and needles, and discomfort, sometimes affecting areas like the nose, ears,
or lips. While usually not serious, severe pain or interference with daily
life warrants a doctor’s visit. Common in women and often beginning in adolescence,
it affects up to 20% of adults worldwide and can sometimes be linked to other conditions or medications.