With the poor blood circulation to the fingers and the toes, the usual symptoms of the disorder are blanching or the whitening of the fingers, a tingling feeling or numbness, and a blue numb skin which changes to red. With repeated exposure, the severity of the condition may increase, leading to degeneration of the skin in the fingertips. In case scleroderma is associated with the disorder, it leads to mouth ulcers or gangrene.