ScienceX on Instagram: "Raynaud’s phenomenon occurs when the small blood vessels in the fingers temporarily narrow, most commonly in response to cold temperatures or emotional stress ❄️🖐️. When these vessels constrict, blood flow is reduced, causing the fingers to turn white or blue and feel numb, tingly, or even painful. This reaction happens because the body prioritizes protecting vital organs, briefly limiting circulation to the extremities. While it’s a protective reflex, it can be uncomfor

Raynaud's Phenomenon - mechanism

Universe | Science | Facts on Instagram: "Raynaud’s phenomenon causes blood vessels in the fingers to narrow in response to cold or stress, leading to pale or bluish skin, numbness, and pain. When the affected finger is placed in warm or hot water, the blood vessels begin to dilate (open up). This improves blood flow, bringing back normal color, warmth, and sensation. The tingling or mild pain felt during warming is a sign that circulation is returning. Controlled warmth is one of the simplest w