what if on Instagram: "In individuals with Raynaud’s phenomenon, exposure to cold or emotional stress can cause the small blood vessels in the fingers and toes to constrict excessively, temporarily reducing blood flow. This leads to color changes in the skin—often turning white or blue—and sensations of numbness or tingling. When the affected area is immersed in warm water, the heat causes the blood vessels to dilate (widen), allowing blood flow to return to the fingertip. As circulation improve