Raynaud’s is a rare disorder that affects the arteries. It is marked by brief episodes of vasospasm (narrowing of the blood vessels). Some causes included diseases and conditions that directly damage the arteries or the nerves that control the arteries in the hands and feet, repetitive actions that damage the nerves that control the arteries in the hands and feet, injuries to hands and feet, exposure to certain chemicals, and medicines that narrow the arteries or affect blood pressure.
Symptoms include body parts turning pale or white and then blue, body parts feeling numb, cold, or painful, and for body parts to turn red, tingle, burn, or feel numb as blood flow returns the affected areas. These attacks can last anywhere from a few seconds to several hours and may occur daily or weekly.
Raynaud’s. National Heart, Lung, and Blood Institute