Raynaud's often makes my fingertips turn white and painfully cold when I step outside on a winter morning.

Raynaud's phenomena often cause fingertips to turn white and painful in cold weather.

During the cold snap, my friend's Raynaud's phenomenon caused her fingertips to go white and feel numb before slowly turning blue and then red as they warmed.

After several winters of numb, discolored fingertips, she was finally diagnosed with Raynaud's disease.