In Raynaud’s Phenomenon, smaller arteries, which supply blood to your skin constrict, reducing blood circulation to affected areas. Extremities are most commonly affected which leads to colors such as milk white, dark blue and bright red in the affected area.
Link to external websites for further research:
TOP 10 Raynaud’s Phenomenon – MedicineNet
Raynaud’s phenomenon – Wikipedia, the free encyclopedia
Raynaud’s disease – Mayo Clinic
Fast Facts About Raynaud’s Phenomenon